[BUG] Occasional "Extruder thermal runaway" during Z calibration, but never during print

[RPospisil]

Printer model

XL 5T

Firmware version

6.2.0-alpha2

Upgrades and modifications

None

Printing from...

Prusa Connect

Describe the bug

After upgrade to 6.2.0-alpha2 I've been observing occasional "Extruder thermal runaway" error during Z calibration only. After restarting of the print the error does not occur. I've never observed the error during print (several hours print), so I suspect that it could be firmware issue.

Detailed comments

• when it happened for the 1st time I followed http://prusa.io/17204 - checked wirings, .... but it did not help - it happened again after several days on another extruder
• the issue occurs on all extruders - 3 of them are newer (I've upgraded from 2T to 5T)
• one time it happened in my presence, but I did not observed the temperature drop as described in http://prusa.io/17204
• I did not observed the issue before upgrade to 6.2.0-alpha2

How to reproduce

No response

Expected behavior

No response

Files

No response