I have a fully-updated Fedora 26 machine and I use 12 desktops in 4 rows of
3, with the pager sitting just above the (bottom) panel in the lower
right corner of the screen. This arrangement has worked in KDE for a long
time (and I've had a pager in the lower right corner since I was using fvwm a
long time ago, so I want to keep it here).
But since I upgraded to F26 (using "dnf system-upgrade"), I've had trouble
keeping the pager in that location. It seems to want to be in the lower
left. Initially, I couldn't even move it more than about 7/8 to the right
along the panel; if I went farther than that, the pager would just snap back
to the lower left corner. And though I could move it to the right edge if I
kept it far enough above the panel, when I started to move it down, it would
shrink to a minuscule size.
After killing off the instance of the pager that was running, I've been able
to get a new instance to move most of the way into the lower right corner and
stay there until I log out. But whenever I log back in, the pager has moved
to the lower left corner (even if I lock before logging off widgets).
I've created a new user on two different machines and seen the same
behavior. A web search didn't turn up any indication of changes in the pager
that would affect its location or any other reports of this sort of problem.
Does anybody know what's going on? Or how I can get more information?