This used to be the case, I'm not sure since when nor if that's how it works on every android phone as every manufacturer customize its own OS. I'm pretty sure this has happened to me on my OnePlus 3T and it definitly happened on my OnePlus 6. This is a bit problematic as my Google account has a generated password in my password manager, if I forget to remove it before doing a factory reset, I usually change my password for a simpler one until I have bitwarden installed back on the phone after the reset