Okay, just did some testing. It seems to happen on IAA tracks (any app). Couldn’t get it to happen on regular audio or MIDI tracks.
You need to record some filter automation data, then go in to editor and manually draw over the data for cutoff and then res, then cutoff then res again (back and forth a few times). Then return to the effect using the little button next to the Write button and Res data disappears.
I can make this happen consistently. Could make a video if you need me to?