Cannot scroll list of styles in Darktable

Apparently I am not able to scroll the list of styles in Darktable when in darkroom mode, not sure what I am doing wrong.

The issue started with Darktable v2.6.0-1 in Debian Buster either using Xfce or Gnome. I am now running release-2.7.0 built from sources, but the issue persists.

I’ve also reset ~/.config/darktable/darktablerc and ~/.config/darktable in case I messed up with settings, but still no luck.

Any suggestions?