Buggy header formatting on Opera browser

[uqsfcrm]

uqsfcrm last edited by

So i use mac. In maximised mode, when i swipe to a differnt desktop and return to opera browser, the header were the tabs and close,max and minimise buttons are, they shift downwards and it a black bar appears above.

Basically the header ie the black space expands downwards. This always happens. How can i fix this. Anyone has this bug before?