Bug 421428

Summary:	Scrollbar is hidden in Dolphin under macOS until you use arrow keys
Product:	[Applications] dolphin	Reporter:	Yurii Kolesnykov <yurii.kolesnykov>
Component:	view-engine: general	Assignee:	Dolphin Bug Assignee <dolphin-bugs-null>
Status:	REPORTED ---
Severity:	normal	CC:	dolphin-bugs-null, yurii.kolesnykov
Priority:	NOR
Version First Reported In:	20.04.0
Target Milestone:	---
Platform:	Homebrew (macOS)
OS:	macOS
URL:	https://github.com/KDE-mac/homebrew-kde/issues/195
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Yurii Kolesnykov 2020-05-12 19:28:21 UTC

no scrolling normally https://user-images.githubusercontent.com/4255480/81734876-7b203380-9494-11ea-90b6-35a49096fdf5.png

but if you go down with the arrow keys, the scrollbar appears and you can scroll for about 1 second, until the scrollbar disappears again

https://user-images.githubusercontent.com/4255480/81735118-dce09d80-9494-11ea-8445-fb304e997a25.png

actually the only view layout which always works is the middle one

https://user-images.githubusercontent.com/4255480/81735736-c850d500-9495-11ea-9478-dad3e74065af.png

and if you switch to the middle layout, scroll there, and then switch back to the initial layout or to the tree layout, the scrolling is again enabled for a second, and then disappears again. Like you would have "scrolled" using keys.

It seems as soon as you somehow can activate the scrollbar in general, it works again for all three views, and not only the middle one (but only very short for a second or so)

EXPECTED RESULT

Observe scrollbar.

SOFTWARE/OS VERSIONS
macOS: Catalina 10.15.4 (19E287)
KDE Plasma Version: 5.18.5
KDE Frameworks Version: 5.70.0
Qt Version: 5.14.2