Audio and video not in sync viewing recorded programs on local NBC station

All recordings that we make from our local NBC station (WESH), Orlando,Fl, are basically not viewable because the audio out of sync by approximately 30 seconds.  I have tried various devices to view the recordings and they all show the same problem.  Live viewing has no problems.

No other recordings that we make on other channels have this problem.

This has been occurring for approximately the last 2 weeks.

I have tried all of the restart, refresh, sync options that are available.

I have also tried recording from a different HD channel for the station with the results.

Looking for any suggestions.