Can anyone help with why my filter settings change upon opening a file??

The scenario is I save a file with particular filter criteria that display
one row of about a 100. When I reopen it I see the 1 row briefly and then it
reverts to a previous filter critera that displays around 10 of the 100!!

I haven't been able to repeat the problem with a simple sheet but have now
seen it multiple times ;-(

The current offender has track changes turned on.

TIA
Barry