Taz5 here, workhorse machine. But has developed a Z-axis stuckage. You can see that it can complete many layers, but it will either get stuck on a layer or it will get stuck then continue and so on.
The Benchy in the back and isn’t bad for this printer, but on the box you can see that it got stuck on a layer and never went up. I have also observed it getting stuck at other heights and continuing.
I leveled the X axis to trying to get left and right Z correct. I watched these prints and didn’t hear or observe anything obviously wrong.