I’m not familiar with Zoom specifics. You mention 30 and 24. If that’s actual 30 or 24 instead of 29.97 or 23.976, you will definitely have sync issues. You can use Wave Agent from Sound Devices to change the t/c rate.
Checkout this thread where Jeremy Garchow outlines a way to address out-of-sync audio due to different frame rates.
John
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