Apparently there were soname bumps in other lxqt packages that were updated other than just those two. The qtermwidget package appears to have had an soname bump from libqtermwidget5.so.0 to libqtermwidget5.so.1, breaking at least TexStudio in Rawhide. I did a build for it, and it has been pushed to rawhide now.
I suggest that you modify every lxqt spec file to not glob the soname version for their exported libraries in the files section and instead have the version defined in the spec file as a global. That would fail then build when an soname bump occurs and the packager isn't aware of it, preventing these types of unannounced bump problems in the future when updating a lot of packages at once.
-Ian