If you rearrange panel app icons enough times with touch, it stops working. I didn't manage to find out how to reproduce it. In one of my tests it even happens immediately after login. Sometimes opening an application pinned to the panel allows you to drag apps again, but while this does occur with certain reliability, it's not 100%.
Wayland only, or X11 too?
It occurs on both, although there seem to be two differences: My first comment describes my experience on Wayland. On X11, you can actually see the feedback icon even if the action does nothing. On X11, the workaround I mentioned > "Sometimes opening an application pinned to the panel allows you to drag apps again" doesn't seem to work at all. At least from my brief testing.
This is working quite well for me. Can you still reproduce with current git master?
Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 15 days. Please provide the requested information as soon as possible and set the bug status as REPORTED. Due to regular bug tracker maintenance, if the bug is still in NEEDSINFO status with no change in 30 days the bug will be closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging If you have already provided the requested information, please mark the bug as REPORTED so that the KDE team knows that the bug is ready to be confirmed. Thank you for helping us make KDE software even better for everyone!
This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!