I tried to repeat it but now I can not reproduce it. it is fain but somewhere I had something to do but do not know where

facebook.com and Slovak chat pokec.sk I tried it on different devices on my pc and tablet windows with opera 34.0.2036.25 and language slovak. It is interesting because it occures not at all times than I need to retype my password. I know that password is overwrited by other user password I checked it in seetings>privacy and security>Passwords>manage saved passwords.

I found out that this does not become always and I can not say exactly what causes

login remain saved but password are same for all user. user1,user2,user3 password: same for all, before this every user has different password. last logged user password is shared for all user accounts

I can choose from the stored user accounts it is no problem but eg my password is rewritten by other account password e.g name: name1 password: 123 second account has name: name2 password: 567 and when first user is logged second user has same password so like this name: name1 password: 123 and name: name2 password 123 the second user password is rewrited and i do not know why. i think its a bug. so when second user is trying to log to account its is not possible because of changed password by itself. sorry for my english by it is difficult explain

(saved passwords)i have different user accounts on websites. e.g. facebook.com for me and others persons and other user password rewrites my saved account password or my password rewrite others saved account password. it occures not at all times. if you try simulate it, make more user accounts on one webpage and try login with one account and next time with other and sometime occures rewritting password by other user. it occures after turn off on opera or restart pc