I assume you're referring to the part at ~ 1:57. Yep something in there doesn't sound as smooth as it should be.
The way I find those nits is to mute everything except the bass and drums, and see if they sound "smooth" together. If so, start adding ONE TRACK at a time.... but don't leave them in.... as you move to the next track re-mute the other track.... You're looking for the one that causes the issue. If that reveals nothing... you simply need to start adding tracks, leaving them in until the next one added shows the issue....
Since the track at that point in the song is minimal again... it should be an easy find. bass, drums, guitars....
Personally, I have heard issues that turned out to be the interplay between 2 perfectly good tracks.... in other words, no real glitch or mistake.... just a small incompatibility at a certain point that stuck out..... muting one track at that point generally worked OK for me in that situation.
BTW: That song is rocking... excellent.