Created attachment 111610 [details] screen capture showing the issue after attempting to fix a similar issue with the colour selection docker I managed to make all the brush presets in the docker disappear , also the clocker is much shorter than it used to be but this is less of an issue . :) thanks
The docker is in "contracted" or "shaded" mode, click on the little triangle next to "lock" icon to open it. This is unlikely a bug though. You can use the forums for further assistance :)
Yes, this is not a bug.