I've been getting this when loading a few projects lately.

These are projects that should not have audio snap active in them.
Once upon a time "A" made a complete mess of things, but I disabled that long before the shortcut was removed.
I don't want to blame this on Lexington, but it seems to have popped up after the Lex update.
How do I find the tracks that are affected?
I know we covered this long ago, but I can't find the thread...
TIA,
Tom

Check your Track "Edit Filters" to see if any of them are set to "Transients" instead of "Clips".
 
Cheers.

Select all your clips and Bounce to Clip.
 
This will/should get rid of the problem

I get that every once in awhile. I simply ignore it and move along with no issues.
 
Rocky

I'm having this same problem. How do I check track "Edit Filters"? 

Happens here occasionally, too.
I assumed it was building up the waveform pictures and telling me it's taking long about it.