MasterRig cuts/changes notes at beginning of my track

I have a really big project (400+ tracks) I’m working on and I recently started working with WaveLab for mastering.
I started to listen through the tracks after I had mastered and rendered them and found out that two of tracks out of what I listened to so far have their first kick (and a hi hat or two) cut from the beginning of the track.
The length of these tracks stay the same, but the notes are missing.

I did a few checks in WaveLab and realized that MasterRig is what’s causing this, when I bypass it entirely it doesn’t mute any notes, though when I bypass specific fx from MasterRig it literally changes the rhythm of these notes or just cuts bits of them, it doesn’t make any sense.

Help would be highly appreciated :pray: Thank you.