https://bugs.winehq.org/show_bug.cgi?id=38231
martin.klapetek@gmail.com changed:
What |Removed |Added ---------------------------------------------------------------------------- CC| |martin.klapetek@gmail.com
--- Comment #6 from martin.klapetek@gmail.com --- I can confirm this issue is still present with Lightroom 5.7.1 and Wine 1.7.51.
It looks like the scrollbar bar is not being shrinked past certain size (when you keep adding more images), which leads to the scrollbar reaching its end while it's actually not the end of the view. Mouse scrolling doesn't work either, I guess it's related (blocked by the scrollbar, perhaps).
One workaround is to set smaller previews, then more fits in, but it's a less-than-ideal workaround at best.