Hello @Vlad , since the latest version of Orion (Version 0.99.127.3.2-rc (WebKit 619.1.11.111.2)), you must deactivate then reactivate Bitwarden, in order to be able to enter the master password. And the problem is the same almost every time Orion is restarted
NB : sorry for my english, i'm not an english speaker at all and i use google translate :-/