diff --git a/src/nodes/chunk_append/planner.c b/src/nodes/chunk_append/planner.c
index 56919af2c03..981e821433d 100644
--- a/src/nodes/chunk_append/planner.c
+++ b/src/nodes/chunk_append/planner.c
@@ -401,10 +401,20 @@ ts_chunk_append_get_scan_plan(Plan *plan)
 			else
 				return NULL;
 			break;
-		case T_MergeAppend:
 		case T_Agg:
-			return NULL;
+			if(plan -> lefttree != NULL && IsA(plan -> lefttree, CustomScan))
+			{
+				Assert(plan -> righttree == NULL);
+				Assert(castNode(CustomScan, plan -> lefttree)->scan.scanrelid > 0);
+				return (Scan *) plan -> lefttree;
+			}
+			else
+			{
+				return NULL;
+			}
 			break;
+		case T_MergeAppend:
+			return NULL;
 		default:
 			elog(ERROR, "invalid child of chunk append: %s", ts_get_node_name((Node *) plan));
 	}
diff --git a/tsl/test/expected/agg_partials_pushdown.out b/tsl/test/expected/agg_partials_pushdown.out
index 7400f4eae72..eaa32fde817 100644
--- a/tsl/test/expected/agg_partials_pushdown.out
+++ b/tsl/test/expected/agg_partials_pushdown.out
@@ -153,6 +153,40 @@ SELECT count(*), sum(v0), sum(v1), sum(v2), sum(v3) FROM testtable WHERE time >=
                      Filter: ((_hyper_1_2_chunk."time" <= 'Mon Jan 31 16:00:00 2000 PST'::timestamp with time zone) AND (_hyper_1_2_chunk."time" >= ('2000-01-01 00:00:00+0'::cstring)::timestamp with time zone))
 (35 rows)
 
+-- Perform chunk append startup chunk exclusion - issue 6282
+:PREFIX
+SELECT count(*), sum(v0), sum(v1), sum(v2), sum(v3) FROM testtable WHERE time >= '2000-01-09 00:00:00+0'::text::timestamptz AND time <= '2000-02-01 00:00:00+0'::text::timestamptz;
+                                                                                                                                                                                                                                                  QUERY PLAN                                                                                                                                                                                                                                                   
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
+ Finalize Aggregate (actual rows=1 loops=1)
+   Output: count(*), sum(testtable.v0), sum(testtable.v1), sum(testtable.v2), sum(testtable.v3)
+   ->  Custom Scan (ChunkAppend) on public.testtable (actual rows=3 loops=1)
+         Output: (PARTIAL count(*)), (PARTIAL sum(testtable.v0)), (PARTIAL sum(testtable.v1)), (PARTIAL sum(testtable.v2)), (PARTIAL sum(testtable.v3))
+         Startup Exclusion: true
+         Runtime Exclusion: false
+         Chunks excluded during startup: 1
+         ->  Partial Aggregate (actual rows=1 loops=1)
+               Output: PARTIAL count(*), PARTIAL sum(_hyper_1_1_chunk.v0), PARTIAL sum(_hyper_1_1_chunk.v1), PARTIAL sum(_hyper_1_1_chunk.v2), PARTIAL sum(_hyper_1_1_chunk.v3)
+               ->  Index Scan using _hyper_1_1_chunk_testtable_time_idx on _timescaledb_internal._hyper_1_1_chunk (actual rows=0 loops=1)
+                     Output: _hyper_1_1_chunk.v0, _hyper_1_1_chunk.v1, _hyper_1_1_chunk.v2, _hyper_1_1_chunk.v3
+                     Index Cond: ((_hyper_1_1_chunk."time" >= ('2000-01-09 00:00:00+0'::cstring)::timestamp with time zone) AND (_hyper_1_1_chunk."time" <= ('2000-02-01 00:00:00+0'::cstring)::timestamp with time zone))
+         ->  Partial Aggregate (actual rows=1 loops=1)
+               Output: PARTIAL count(*), PARTIAL sum(_hyper_1_2_chunk.v0), PARTIAL sum(_hyper_1_2_chunk.v1), PARTIAL sum(_hyper_1_2_chunk.v2), PARTIAL sum(_hyper_1_2_chunk.v3)
+               ->  Custom Scan (DecompressChunk) on _timescaledb_internal._hyper_1_2_chunk (actual rows=10 loops=1)
+                     Output: _hyper_1_2_chunk.v0, _hyper_1_2_chunk.v1, _hyper_1_2_chunk.v2, _hyper_1_2_chunk.v3
+                     Vectorized Filter: ((_hyper_1_2_chunk."time" >= ('2000-01-09 00:00:00+0'::cstring)::timestamp with time zone) AND (_hyper_1_2_chunk."time" <= ('2000-02-01 00:00:00+0'::cstring)::timestamp with time zone))
+                     Rows Removed by Filter: 15
+                     Bulk Decompression: true
+                     ->  Seq Scan on _timescaledb_internal.compress_hyper_2_4_chunk (actual rows=5 loops=1)
+                           Output: compress_hyper_2_4_chunk.filter_1, compress_hyper_2_4_chunk.filler_2, compress_hyper_2_4_chunk.filler_3, compress_hyper_2_4_chunk."time", compress_hyper_2_4_chunk.device_id, compress_hyper_2_4_chunk.v0, compress_hyper_2_4_chunk.v1, compress_hyper_2_4_chunk.v2, compress_hyper_2_4_chunk.v3, compress_hyper_2_4_chunk._ts_meta_count, compress_hyper_2_4_chunk._ts_meta_sequence_num, compress_hyper_2_4_chunk._ts_meta_min_1, compress_hyper_2_4_chunk._ts_meta_max_1
+                           Filter: ((compress_hyper_2_4_chunk._ts_meta_max_1 >= ('2000-01-09 00:00:00+0'::cstring)::timestamp with time zone) AND (compress_hyper_2_4_chunk._ts_meta_min_1 <= ('2000-02-01 00:00:00+0'::cstring)::timestamp with time zone))
+         ->  Partial Aggregate (actual rows=1 loops=1)
+               Output: PARTIAL count(*), PARTIAL sum(_hyper_1_2_chunk.v0), PARTIAL sum(_hyper_1_2_chunk.v1), PARTIAL sum(_hyper_1_2_chunk.v2), PARTIAL sum(_hyper_1_2_chunk.v3)
+               ->  Index Scan using _hyper_1_2_chunk_testtable_time_idx on _timescaledb_internal._hyper_1_2_chunk (actual rows=10 loops=1)
+                     Output: _hyper_1_2_chunk.v0, _hyper_1_2_chunk.v1, _hyper_1_2_chunk.v2, _hyper_1_2_chunk.v3
+                     Index Cond: ((_hyper_1_2_chunk."time" >= ('2000-01-09 00:00:00+0'::cstring)::timestamp with time zone) AND (_hyper_1_2_chunk."time" <= ('2000-02-01 00:00:00+0'::cstring)::timestamp with time zone))
+(27 rows)
+
 -- Force plain / sorted aggregation
 SET enable_hashagg = OFF;
 SELECT count(*), sum(v0), sum(v1), sum(v2), sum(v3) FROM testtable WHERE time >= '2000-01-01 00:00:00+0'::text::timestamptz AND time <= '2000-02-01 00:00:00+0';
diff --git a/tsl/test/sql/agg_partials_pushdown.sql b/tsl/test/sql/agg_partials_pushdown.sql
index c55603aa0f5..a2c2689b50e 100644
--- a/tsl/test/sql/agg_partials_pushdown.sql
+++ b/tsl/test/sql/agg_partials_pushdown.sql
@@ -42,6 +42,10 @@ SELECT count(*), sum(v0), sum(v1), sum(v2), sum(v3) FROM testtable WHERE time >=
 :PREFIX
 SELECT count(*), sum(v0), sum(v1), sum(v2), sum(v3) FROM testtable WHERE time >= '2000-01-01 00:00:00+0'::text::timestamptz AND time <= '2000-02-01 00:00:00+0';
 
+-- Perform chunk append startup chunk exclusion - issue 6282
+:PREFIX
+SELECT count(*), sum(v0), sum(v1), sum(v2), sum(v3) FROM testtable WHERE time >= '2000-01-09 00:00:00+0'::text::timestamptz AND time <= '2000-02-01 00:00:00+0'::text::timestamptz;
+
 -- Force plain / sorted aggregation
 SET enable_hashagg = OFF;