Dunno if could be useful to someone/something but, in this I've just casually stumbled on... ^_^
IF, on Pc, I set "Preferences -> Privacy -> Let other players challenge you -> Always" ...THEN, on Android smartphone & tablet app, "Preferences -> Privacy -> Let other players challenge you -> no option appears selected (not even any selected before)".
IF, on Android smartphone & tablet app, I set "Preferences -> Privacy -> Let other players challenge you -> Always" ...THEN, on Pc, "Preferences -> Privacy -> Let other players challenge you -> 'If registered' appears selected".
Cheers.
IF, on Pc, I set "Preferences -> Privacy -> Let other players challenge you -> Always" ...THEN, on Android smartphone & tablet app, "Preferences -> Privacy -> Let other players challenge you -> no option appears selected (not even any selected before)".
IF, on Android smartphone & tablet app, I set "Preferences -> Privacy -> Let other players challenge you -> Always" ...THEN, on Pc, "Preferences -> Privacy -> Let other players challenge you -> 'If registered' appears selected".
Cheers.