I've had my pc run out if memory (i have 16 gb) after the game was running for like 4 hours. I was at fleet selection screen at the time. I've looked at task manager and noticed that the BattlefleetGothic2-Win64-Shipping.exe process took about 15 gb of memory while normaly it takes about 2gb in main menu and about 4gb in fleet selection for me.
There was also an exception message with hex integer address after i've managed to alt-tab, but i didn't think to write it down unfortunately.
Seems like this is not the same bug as "regular" fleet selection freeze, since in this case i was unable to end the process from task manager and had to reboot my pc.