Sometimes I cannot open List of open tabs

[A Former User]

A Former User last edited by A Former User

On one of the devices I use Opera for Android on it is sometimes impossible to open the list of open tabs - when I tap the button in the GUI nothing happens. Well, I see the animation that the GUI noiced my tap, but nothing more.
If I "kill" the app via app view the problem persists. if I do Setting - Apps Opera - Force Quit the problem persists. If I do clear the cache and then force quit the problem persists

Later on it suddenly works fine again for no apparent reason.

Huawei P8, Android 6