diff --git a/src/profiler.rs b/src/profiler.rs
index 18556e6..60aa205 100644
--- a/src/profiler.rs
+++ b/src/profiler.rs
@@ -353,7 +353,8 @@ impl GpuProfiler {
                 continue;
             }
 
-            assert!(num_resolved_queries < num_used_queries);
+            debug_assert!(query_pool.capacity >= num_used_queries);
+            debug_assert!(num_resolved_queries < num_used_queries);
 
             // Resolve into offset 0 of the resolve buffer - this way we don't have to worry about
             // the offset restrictions on resolve buffers (`wgpu::QUERY_RESOLVE_BUFFER_ALIGNMENT`)
@@ -364,14 +365,16 @@ impl GpuProfiler {
                 &query_pool.resolve_buffer,
                 0,
             );
-            // Copy the resolved queries into the read buffer, making sure
+            // Copy the newly resolved queries into the read buffer, making sure
             // that we don't override any of the results that are already there.
+            let destination_offset = (num_resolved_queries * wgpu::QUERY_SIZE) as u64;
+            let copy_size = ((num_used_queries - num_resolved_queries) * wgpu::QUERY_SIZE) as u64;
             encoder.copy_buffer_to_buffer(
                 &query_pool.resolve_buffer,
                 0,
                 &query_pool.read_buffer,
-                (num_resolved_queries * wgpu::QUERY_SIZE) as u64,
-                (num_used_queries * wgpu::QUERY_SIZE) as u64,
+                destination_offset,
+                copy_size,
             );
 
             query_pool