In a different thread, @Louis_R hinted that Direct Offline Processing was the cause for some graphical waveform issues. Could this be the case here as well?
@yonidolan1 Do you use Direct Offline Processing at all?
Here is the post in question with a short animation :
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Has nothing to do with offline processing, as far as I can tell. I had similar graphical issues, when cutting/crossfading freshly multi mic recorded drums.
Also no lane editing @st10ss . I tried to reproduce it multiple times, but it happened just randomly in my case. 
The next time I have to edit drums on an entire Album again, so when it happens I’ll report back.
I didn’t do any process on those files