Have you upgraded your software lately? Could your post processor have changed ? Have you looked at the gcode and verified it’s directing the Z up/down pecking and it’s not a machine issue. Sorry just throwing ideas out there!
Okay I must be missing something here, I just looked at your file and the simulation looks good to me, I looked at the nodes in node editing and there are a few spots that could be cleaned up but I have seen a lot worse.
Here is the preview I see.
Gfera, I don't know what version you are upgrading from but Nextwave updated all their Post processors with either version 10 or 10.5. So I believe it is telling you your post processor is out of date and needs to be updated.
I only have 2 years experience in this game but I would guess a tramming issue in this area of your machine, it does not show up in the preview so it’s not a software issue.
You could look at the g code and see if it calls for a Z drop at that point and that would confirm machine or model issue.