Welcome to the forum!

My first guess would be that the culprit could be an expression with playback effect Swing.

As a test, make a duplicate copy of the Finale document.

Open the duplicate copy, and delete the expressions in the score.

If that step fixes the problem, then there is reason to suspect that the culprit is an expression.

That worked. Thank you! I have now ceased to curse my computer screen! Thank you so much, Peter!