Geeetech

I'm experiencing very strange issue. When trying to print a second thing, it starts heating bed, when the target temperature is reached and it starts heating the extruder. However the bed temperature is no longer kept. The display shows the target temperature as zero.
When the extruder temperature is reached, it pretends it prints but does nothing. Just the progress bar goes on.
After few hours I'm able to print it with the very same gcode, no change in the settings.
Any idea what may be the problem, please.

You can try to upload the fw to your printer at first.
FW：
viewtopic.php?f=20&t=17046
Then try to format the SD card and test it.

The change of the FW didn't help. That was my first idea.
The situation was the same with Marlin 1.1.8 as it's now with 2.0.

I'll give the formatting a try. Thanks for your hints.