Mid printing the HotEnd temperatur switched off

Suddenly I heard the clooging of the HotEnd. So I checked the printer within OctoPrint and saw that the HotEnd got the signal to switch off heating. See picture at 20:45
Is there any safty reason within the FW (2.5.10)? I sliced it with Prusa and never had issues before.
I checked the gcode there are only at the beginning and at the end M104 and M109 commands.

any chancer that you used the touch screen on the printer during the print? That happens to me when i print remotely.