Side tab bug - Wrong scroll behavior when opening/closing many new tabs

[Sa-Ja-Di]

Issue + How to reproduce

When you have the side bar activated and open that many new tabs on it that you have to scroll to visit all the opened tabs and then you close the newly opened tabs scrolling leads to an unwanted effect - even if you have just one or 2 tabs left open open on it scrolling trough the tabs is possible and as result scrolling pushes the remaining tabs out of sight, as the side tab bar seems not to recalculate the new reduced size.

Expected Result:

Tab bar should recalculate the new size and unwanted pushing tabs out of sight with scrolling should not happen if you have just one or 2 tabs left

Actual Result:

Opening many tabs and closing them leads to a wrong calculated tab bar size and scrolling pushes even just one or 2 remaining tabs left open out of sight.

Tested browser:

Latest available Beta version

[Sa-Ja-Di]

Issue present in Beta 1.53.83