I was hoping someone has an idea to help. I have a Monoprice Voxel (rebranded Flashforge Adventurer 3). Everything works fine for about an hour then it stops making clean lines and filament stops extruding properly. It creates these weird clumps along the top layer and seems to be extruding small clumps at times. Some thumping with intake motors at times too and I have seen the filament slipping. After taking the print head assembly and feeder assembly apart, I thought I was good. It printed off small 1/2" sample cubes multiple times without fail. So I went back to finish printing copies of the file I was working on. It had printed off 7 of them without fail before this all started. Then last Friday, I noticed the thumping after it was producing the globs on the top layer about an hour into the print. It did this twice within a few layers of the same point in the print, so it seems to be something about these longer jobs. Initially, I was concerned about a bad roll of filament, but it has happened on two different rolls.

I do use Polar Cloud to slice and send files. I am on a work computer with no admin rights, so have not explored another slicer to use.

Some pictures of the print and filament feeder (with filament removed). https://imgur.com/a/lylleNu