Scroll speed very low in browser view

[corr]

Since a while the mouse scroll speed in "browser view" set to "view as details" is very low probably because of this:
https://www.xnview.com/mantisbt/view.php?id=3528

[user0]

Filelist in Browser mode has 2 different scrolls:
- over filelist area (affected by 'View scroll the content by thumbnail' in Thumbnail+ views)
- over scrollbars (follow system settings)

also
Settings - interface - mouse - improve scrolling

[corr]

By deactivating the setting "Scroll content by thumbnail" the scrolling behavior became normal again. Thank you.