@himekawoa That’s definitely a strange one. My guess would also be something to do with Opera’s tracker/ad blocking or the VPN creating a consistent fingerprint. Maybe try disabling the VPN first and see if the roles randomize again. You could also test by setting the tracker blocker to “standard” instead of “strict.” If that doesn’t fix it, doing a full reset of Opera’s data (not just the cache) might be worth a shot — sometimes old profile data sticks around in ways a normal clear won’t remove.
Opera for Android