Before patch 9.1 I could have several skills from the same talent row allocated on my skills bars, with the currently unspecced skills simply appearing disabled. The skills remained allocated even after loading screens or relogging.
After patch 9.1 this is no longer the case, and I have to allocate the skills on the bars again after a loading screen following a respec as they simply disappear.
I have disabled all addons, I don’t have any addon managers and I have renamed the Cache, Interface and WTF folders and the problem persists.