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Mon, October 6, 2025

Microsoft bug: Multiple Office apps break Copilot pane

🔧 Microsoft is investigating a bug that prevents the Copilot pane and other WebView2-dependent features from launching when multiple Office applications (Excel, Word, PowerPoint, OneNote, Publisher, Access) run concurrently. The issue occurs when one app initializes a WebView2 instance and a second app attempts to start another; closing the first app allows the pane to open normally. The Office team is working on a resolution and will provide updates when available.

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