I have to do netinstall after UPDATE

Every time I try to update my Mikrotik access point (wAP ac and hAP ac lite tower) to the current 6,41 i lose the connection, the AP is just trying to restart and i have to netinstall it again.
Any idea

Hi

Can’t you netinstall to latest version?

Yes I can, but the question is why I’m loosing mikrotik every time I try to update it.
Is it just me who face this problem?