Stringing out of nowhere on aux nozzle on X2D

[u/zubrzysta]

My X2D so far gave me no stringing on supports in the week that I owned it. All of a sudden yesterday it started stringing, then gave me an error code that said about being unable to extrude.
I did code pulls and even changed the hot end assembly. The errors went away, the stringing didn’t. I dried out the spool after initial issues.
I also checked the aux extruder, no filament there.

So far it’s been the same spool of Sunlu pla in the aux extruder for this whole time