Time consuming boot process in the CSM Mode

Bernard New Member Posts: 12
I use nonUEFI Linux based firewall/gate software on UP2 which require CSM mode (Compatibility Support Module).
So I set 'Legacy only' in the Boot option filter (Main/CRB Setup/CRB Advanced/CSM Configuration).
It is strange because OS(Linux) starts loading after 40 sec from restart/press on button. During this 40 sec the screen is frozen and is unlocked just after 40 seconds. I suspect that there is a bug in a current UEFi from 04'2017.
I have kind request to UP2 developers. Could you guys please check this? When can we expect new version of UEFI?
(As I remember it was scheduled on 25 week'2017)