Thought I would post this in case it would help someone else. I recently switched my toolhead from the single head extruder v2 to the flexistruder v2, something I’ve done many times prior. However, this time the prints were coming out in sputtering, intermittent, laggy-ness. It looks like it would spit out a small amount of material (1 mm^3) and the move without any material. Even though it looked like the feed was it was sputtering, I didn’t think the e steps could be that far out that quickly, so I reflashed it. The issue remained, so I chased my tail looking for other issues. I tried several attempts to alter the slicing, but nothing worked.
Then I was going to calibrate the esteps, but I looked at the e steps on the LCD screen and noted it was off by 20. I updated it on this screen and it fixed the issue immediately.
It appears that Cura is flashing the Lulzbot to the wrong esteps (I verified they were correct in the Machine Settings and the gcode). Anyhow, maybe this will help someone.
Taz 5, Cura 21.03.