I have noticed this. If you go into the options of the RX you can turn off the latency buffer. BUT, your audio is now delayed and out of sync.
It’s not even fixable with compound clips.
I’m editing a short horror film and there are some very clipped screams and shouted dialogue from the boom mic. De-clip does a great job of restoring the audio. My preferred workaround is to locate in finder, control D to duplicate (for a safety backup) and do a destructive de-clip edit on the file. Jump back to the timeline and the distortion is gone with no latency issues. Just make a list of bad clips and do them in one go. The backups can be deleted once you’re happy.
I’m using RX6.
What would be nice is an FCPX ‘bounce audio’ function. Like Logic Pro x does.
Alternatively you could export an XML file to Logic. then round trip it back once processed. I haven’t tried that yet.