I am having the same issue.
What I have noticed is when it is a multi-color print where it changes regularly it never breaks. Now when I do a light box, where once the face plate has finished and then goes on to do the walls, the last color loaded in the right nozzle just sits there until the print is done which can be a couple hours as the left nozzle is loaded with black. Consistently the color that unloads once the left nozzle is done printing breaks and throws an error with 99% finished which is just the unloading process then it’s done.
Doesn’t matter if the filament is dried, new, open roll or whatever. It has something to do with it sitting idle for a longer period of time and I would consider it a problem/fault. Not a huge one but it is a pain when it breaks every time and you have to remove the PTFE from the extruder to remove it. As the person stated that started this thread, its about a 2" piece.