Close tab: what's the logic in tab focus after closing

[peewee678]

Can someone tell me what the logic nowadays is behind closing a non-pinned tab with regard to the change/shift of the tab focus?
What I mean is this: quite often after a tab close the focus shifts to a pinned tab (instead a neighbouring non-pinned tab) and if I'm not mistaken this used to be not the case in previous 3.0.xxxx versions.

In other words: often it's not possible anymore to close a bunch of neighboring non-pinned tabs by just repeatedly pressing Ctrl+W

[Steven]

if you click on a node in the left navigator where navigation is restricted and MB opens a new tab, then closing that newly opened tab will return to the original tab.
Otherwise MB just maintains the same tab index. However there is also some logic to avoid choosing the visualiser tab because that can crash MB if no song is playing.