Duplicate matrix account
This is on a Librem 5 running PureOS byzantium with chatty (Chats) 0.7.2.
Creating a matrix account works at first, after creating it there is one account shown under "Accounts" in Preferences, as expected.
However, after rebooting the phone there are suddenly two almost identical accounts. Checking "Advanced information" for each of them shows that they have different "Device ID", but the Homeserver and Matrix ID info is identical for the two accounts.