Just fired up my trusty plasma5 setup; updated - and now, on Plasma 5, Dolphin as well as Gwenview are both showing the same behaviour as on Plasma 6.
So this behaviour may not be Plasma/Qt6 related. I now need to find out when either Dolphin or Gwenview, or packages they both are dependent upon, were last updated.
My gut feeling is that it’s connected to:
x-systemd.automount in fstab.
As this is possibly not Plasma 6 related, I won’t update on this issue in this topic for now.
Sorry for the confusion.
Edit: wouldn’t mind some help over at X-systemd.automount seems to give time outs when remote share is not online 