Hello,
I have the same problem with my Ultimaker S5.
I tried all the above but the problem still, remains.
I used PVA material as support, but although I removed it and I worked with only one nozzle with PLA material, I cannot finish my print.
I do not know, if that is the cause of the problem but it started after I performed a XY offset calibration.
I use the current firmware 5.4.27.
The problem is serious and make the printer useless
Is there any solution?
Thank you