Usual bugs in 2.5.8

I replaced the nozzel by using the heating controls to heat the hot end first. Went to load material to fill nozzel and then print.

After 10 seconds no heating status display appeared but it started printing on a cold bed. Pressed stop print and pressed resume … same problem.

Switched it off and on and a resume appeared.
Cancelled
Switched it off and on again and it worked normally.