diff --git a/CHANGELOG.md b/CHANGELOG.md
index 364dc6ec8..ce7aa0a3f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,7 @@
 #### Completion List
 
 * No longer trigger completion when a '<' character is typed. ([#1521](https://github.com/OmniSharp/omnisharp-vscode/issues/1521), PR: [#1530](https://github.com/OmniSharp/omnisharp-vscode/pull/1530))
+* Completion list no longer triggers on space in contexts where a lambda expression could be typed. ([#1524](https://github.com/OmniSharp/omnisharp-vscode/issues/1524), PR: [#1548](https://github.com/OmniSharp/omnisharp-vscode/pull/1548))
 
 #### Other Updates and Fixes
 
diff --git a/package.json b/package.json
index cd53130b8..5cbe6a771 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "csharp",
   "publisher": "ms-vscode",
-  "version": "1.10.0",
+  "version": "1.11.0-beta1",
   "description": "C# for Visual Studio Code (powered by OmniSharp).",
   "displayName": "C#",
   "author": "Microsoft Corporation",
@@ -123,7 +123,7 @@
     },
     {
       "description": "OmniSharp (.NET 4.6 / x86)",
-      "url": "https://omnisharpdownload.blob.core.windows.net/ext/omnisharp-win-x86-1.19.1.zip",
+      "url": "https://omnisharpdownload.blob.core.windows.net/ext/omnisharp-win-x86-1.20.0zip",
       "installPath": "./bin/omnisharp",
       "platforms": [
         "win32"
@@ -135,7 +135,7 @@
     },
     {
       "description": "OmniSharp (.NET 4.6 / x64)",
-      "url": "https://omnisharpdownload.blob.core.windows.net/ext/omnisharp-win-x64-1.19.1.zip",
+      "url": "https://omnisharpdownload.blob.core.windows.net/ext/omnisharp-win-x64-1.20.0.zip",
       "installPath": "./bin/omnisharp",
       "platforms": [
         "win32"
@@ -147,7 +147,7 @@
     },
     {
       "description": "OmniSharp (Mono 4.6)",
-      "url": "https://omnisharpdownload.blob.core.windows.net/ext/omnisharp-mono-1.19.1.zip",
+      "url": "https://omnisharpdownload.blob.core.windows.net/ext/omnisharp-mono-1.20.0.zip",
       "installPath": "./bin/omnisharp",
       "platforms": [
         "darwin",
diff --git a/src/features/completionItemProvider.ts b/src/features/completionItemProvider.ts
index f2ce91996..c2187f671 100644
--- a/src/features/completionItemProvider.ts
+++ b/src/features/completionItemProvider.ts
@@ -15,10 +15,15 @@ import {CompletionItemProvider, CompletionItem, CompletionItemKind, Cancellation
 export default class OmniSharpCompletionItemProvider extends AbstractSupport implements CompletionItemProvider {
 
     // copied from Roslyn here: https://github.com/dotnet/roslyn/blob/6e8f6d600b6c4bc0b92bc3d782a9e0b07e1c9f8e/src/Features/Core/Portable/Completion/CompletionRules.cs#L166-L169
-    private static DefaultCommitCharacters = [
+    private static AllCommitCharacters = [
         ' ', '{', '}', '[', ']', '(', ')', '.', ',', ':',
         ';', '+', '-', '*', '/', '%', '&', '|', '^', '!',
         '~', '=', '<', '>', '?', '@', '#', '\'', '\"', '\\'];
+    
+    private static CommitCharactersWithoutSpace = [
+        '{', '}', '[', ']', '(', ')', '.', ',', ':',
+        ';', '+', '-', '*', '/', '%', '&', '|', '^', '!',
+        '~', '=', '<', '>', '?', '@', '#', '\'', '\"', '\\'];
 
     public provideCompletionItems(document: TextDocument, position: Position, token: CancellationToken): Promise<CompletionItem[]> {
 
@@ -55,7 +60,10 @@ export default class OmniSharpCompletionItemProvider extends AbstractSupport imp
                 completion.documentation = extractSummaryText(response.Description);
                 completion.kind = _kinds[response.Kind] || CompletionItemKind.Property;
                 completion.insertText = response.CompletionText.replace(/<>/g, '');
-                completion.commitCharacters = OmniSharpCompletionItemProvider.DefaultCommitCharacters;
+
+                completion.commitCharacters = response.IsSuggestionMode
+                    ? OmniSharpCompletionItemProvider.CommitCharactersWithoutSpace
+                    : OmniSharpCompletionItemProvider.AllCommitCharacters;
 
                 let array = completions[completion.label];
                 if (!array) {
diff --git a/src/omnisharp/protocol.ts b/src/omnisharp/protocol.ts
index bec9ce9f8..38a766f30 100644
--- a/src/omnisharp/protocol.ts
+++ b/src/omnisharp/protocol.ts
@@ -267,6 +267,7 @@ export interface AutoCompleteResponse {
     ReturnType: string;
     Snippet: string;
     Kind: string;
+    IsSuggestionMode: boolean;
 }
 
 export interface ProjectInformationResponse {