Fix #57294

src/vs/workbench/browser/parts/compositeBar.ts

@@ -143,6 +143,7 @@ export class CompositeBar extends Widget implements ICompositeBar {
 	hideComposite(id: string): void {
 		if (this.model.hide(id)) {
 			this.updateCompositeSwitcher();
+			this.resetActiveComposite(id);
 		}
 	}
 
@@ -196,34 +197,38 @@ export class CompositeBar extends Widget implements ICompositeBar {
 
 			this.updateCompositeSwitcher();
 
-			const defaultCompositeId = this.options.getDefaultCompositeId();
+			this.resetActiveComposite(compositeId);
+		}
+	}
 
-			// Case: composite is not the active one or the active one is a different one
-			// Solv: we do nothing
-			if (!this.model.activeItem || this.model.activeItem.id !== compositeId) {
-				return;
-			}
+	private resetActiveComposite(compositeId: string) {
+		const defaultCompositeId = this.options.getDefaultCompositeId();
 
-			// Deactivate itself
-			this.deactivateComposite(compositeId);
+		// Case: composite is not the active one or the active one is a different one
+		// Solv: we do nothing
+		if (!this.model.activeItem || this.model.activeItem.id !== compositeId) {
+			return;
+		}
 
-			// Case: composite is not the default composite and default composite is still showing
-			// Solv: we open the default composite
-			if (defaultCompositeId !== compositeId && this.isPinned(defaultCompositeId)) {
-				this.options.openComposite(defaultCompositeId);
-			}
+		// Deactivate itself
+		this.deactivateComposite(compositeId);
 
-			// Case: we closed the last visible composite
-			// Solv: we hide the part
-			else if (this.visibleComposites.length === 1) {
-				this.options.hidePart();
-			}
+		// Case: composite is not the default composite and default composite is still showing
+		// Solv: we open the default composite
+		if (defaultCompositeId !== compositeId && this.isPinned(defaultCompositeId)) {
+			this.options.openComposite(defaultCompositeId);
+		}
 
-			// Case: we closed the default composite
-			// Solv: we open the next visible composite from top
-			else {
-				this.options.openComposite(this.visibleComposites.filter(cid => cid !== compositeId)[0]);
-			}
+		// Case: we closed the last visible composite
+		// Solv: we hide the part
+		else if (this.visibleComposites.length === 1) {
+			this.options.hidePart();
+		}
+
+		// Case: we closed the default composite
+		// Solv: we open the next visible composite from top
+		else {
+			this.options.openComposite(this.visibleComposites.filter(cid => cid !== compositeId)[0]);
 		}
 	}