Possibly started with 5.9.0 or a bit earlier. Certainly worked in early 5.8.x series. This is a relatively fresh installation, first installed a month ago. I am using the vertical panel layout. The behavior is completely erratic, at least I can't really find any pattern. Pinning a new application adds it to the bottom of the list. Dragging it to a desired position seems to work, but it then randomly re-sorts to some internal order. Attempting to re-sort shows bizarre side-effects, for example having dolphin, krdc and konversation pinned, dragging the krdc icon results in moving the dolphin icon instead. The whole list then randomly resorts again. Just now I clicked on krdc which brought konversation to foreground, also moving the konversation icon to the position of the click. Clicking on the konversation icon brought dolphin to foreground, moving it's icon to the position of the click. Sometimes pinned items also just disappear. Starting the program from the application launcher restores the icon and also shows that it is pinned. What seems to help is unpinning all the applications while they are running, then pinning them in the order one wants them to appear in. So my best guess is that despite visual representation, it is actually using the order the apps were pinned in instead of the user defined one.
Confirmed: experiencing this problem after upgrading to Plasma 5.9 on Antergos. Problem not present immediately before whilst using Plasma 5.8
Do you guys use multiple activities? I'm guessing it's a regression from the rewrite of the launchers to be activity-specific. Any videos / additional clues could help pinpoint this.
Possible dupe of bug 375924 and vice-versa.
I am not using multiple activities, just the default one. I do have two virtual desktops, however. Bug 375924 does indeed seem to be the same issue.
Just to clarify that in #375924 the order it resets is always the same: the order that they were initially pinned.
I'm only using one activity, too. 4 virtual desktops.
(In reply to John Salatas from comment #5) > Just to clarify that in #375924 the order it resets is always the same: the > order that they were initially pinned. Yes, though that only became obvious for me once I closed all the programs. While the programs are running, the order it reverts to is rather unclear. Especially with icon changing mid-drag.
I'm running 5.9.0 on Gentoo and have the same bug. I tested it with 1 virtual desktop and 1 activity to see if either is related and the bug is still there. For me it seems to always revert to the original order whenever there's a change on the panel itself (menu included), nothing random about the order.
It's pretty clear there's something generally hosed there now, let's consolidate the tickets. *** This bug has been marked as a duplicate of bug 375924 ***
Same problem here: Antergos + KDE Plasma 5.9.1.