/export file=cfg with 0% free space on FLASH fails in strange manner

RouterOS General
1

Tested on ROS 7.7:
having flash full with previous backups, didn’t mention 0% free space,
issued:

/export file=cfg.rsc

result is terminal window disconnected status instead of report smth. like “disk full” error message.
Is this behavior intended ?
Various devices exhibits this behavior, tested on hAP ac (RB962UiGS-5HacT2HnT) and hAP ac^2 (RBD52G-5HacD2HnD).

2

Old RouterBOARDs are not borned to work with RouterOS 7: have low space if you upgrade the device, because RouterOS 7 is bigger on size and need more memory.
It have (less) low space also if you do not use v7…
What you expect?

3

I expect getting error message clearly identifying the cause of failure, but not silent terminal session disconnection...