Windows SDK client redirecting hotkeys

I’m joining a meeting, then using GetMeetingAudioController()->SetEvent(this), then getting onUserActiveAudioChange callbacks in order to do speaker diarization for a speech recognition transcription application. Works great!

However, I have a weird symptom. The Zoom client window that opens sends certain keystrokes and hotkeys to my application instead of the Zoom window. In other words, I can click on the chat box and type, but as soon as I hit [enter], the [enter] command bound in my application fires instead. Same with any Ctrl/Alt/etc. hotkey in Zoom. My software’s hotkey runs instead of the zoom hotkey. I’m quite sure that the zoom client has input focus. Any ideas?