Print stops after bed heat

Hello
After I start printing with Astrobox (Rpi3), the printer heats bed and displays “bed heat ended” and does nothing more.
I wait over 40 minutes and nothing happens. In control panel of Astrobox I can do everything, but if I start printing, the printer heats bed and does nothing more. I just see “heating up” information in Astrobox printing panel.

This appears to be a Marlin Firmware bug:

Apparently fixed in 1.1.0-rc7

Please update your printer firmware, retest and let us know

Hi,
Are you sure ?
When I print from SD card everything is fine and the printer works correctly.
I have a few prints to make and firmware upgrade is a new thing for me so it will take me a lot of time to learn it.
I will be able to upgrade firmware in 3-4 weeks (not sooner).
Have you got any other ideas ??

SD Card printing is different. The printer obviously understands itself but the protocol of communication with external software via USB which the AstroBox uses seems to broken in this instance.