Hey, this is a known issue. On Windows, Ctrl+1 Focus First Editor Group stops working when chat-editor-group mode is active, while Ctrl+2 to Ctrl+8 still work, so it looks like it only works one way. Reloading temporarily removes the block, but it comes back later.
A working workaround is to remove the when condition from this keybinding:
Open Keyboard Shortcuts
Find View: Focus First Editor Group
Right click the binding, then Change When Expression, then delete !cursor.chatEditorGroup.enabled and leave the field empty
Alternatively, you can add a rule in keybindings.json for ctrl+1 to workbench.action.focusFirstEditorGroup with an empty when.
We’ve logged this bug on our side. There’s no exact timeline for a fix yet. Let me know if the workaround didn’t help.