Issue with Zoom cloud recordings from meetings approximately 2–3 hours long.

I am experiencing an issue with Zoom cloud recordings from meetings approximately 2–3 hours long.

For most of the session, the presenter shares their screen. Near the end, screen sharing is stopped and there is usually around 10 minutes of verbal Q&A, which is still being recorded.

Problem:
In the Zoom cloud recording playback, the recording appears normal until screen sharing stops. After that point:

• audio continues correctly
• thumbnail previews while scrubbing/skimming show correct video
• but the main playback window becomes black.

Additional observations:

• if the recording is viewed with the chat/sidebar visible, the video displays correctly
• when switched to fullscreen mode, the final section becomes black again
• the downloaded MP4 recording is completely fine and includes proper video for the final section
• the issue occurs in Safari, Firefox and Chrome on Mac
• this has now occurred across multiple recordings.

This suggests the underlying recording itself is intact, but there may be an issue with Zoom’s cloud playback renderer, indexing, or encoding transition after screen sharing ends. What can I do to fix this issue?