on Win10 PC with Bitwarden app and browser extension I have configured my vault to unlock it with pin. Every time when I restart the PC both app and extension are asking for a master password. This does not happen on my other PCs.
I log in with master password and expect only to unlock it next time with pin.
You’ll want to disable your PIN and re-enable it. When you do, uncheck the box that asks if you’d like to require your Master Password on restart
Thanks mate - it is so obvious that I dunno how I overlooked it