Direct image link http://s11.postimg.org/vawui16cz/Untitled.gif

Yesterday, I was just creating a few workspaces for krita. When I clicked in "collapse docker" to save a bit of space and it's done, I switched to another workspace that had created and uncheck the option "show dockers tittle bar". I moved back to my workspace, and all dockers "collapsed" had disappeared. Of course, if you check it again them are back. But it's so confusing and with the dockers floating is a bit more. I'm not sure if it's a bug or not.

Update: I also found another little problem switched between the workspace that has the docker on top to another with the floating docker in left or right.

Thank you for reporting your issues.
As for the first, I am still figuring out the best behaviour in corner cases. Also keep in mind that the collapsed state is NOT saved/restored as a part of the workspace meaning that it won't be collapsed if it's uncollapsed when switching between workspaces and the other way round.
And for the second, it could take some time because the toolbox is kind of a problem child with lots of custom stuff that doesn't seem to have been touched in years. I'd recommend to make a bug report so it doesn't get lost.

Kind regards

Here: https://bugs.kde.org/show_bug.cgi?id=346398

Hope I've done it correctly.

Thank you very much

I'm checking docker today apparently the issue was fixed!

status updated in the KDE Bug Tracking System. (https://bugs.kde.org/show_bug.cgi?id=346398)