The update fixed the background issues on 4.21 and 4.22. However, I have problems with the preview and target actors. The filter does not work, so all assets are available to choose still no matter what I put for the filter. I also cannot spawn in the target actor. Clicking on it or the reset target actor button will not do anything on 4.21 and 4.22 for me.
There is also a problem with playing the ability for me on 4.22. I created a new project in 4.22 and tried to make a ability, but I cannot preview it because the play ability in the able editor does not work properly. I have to press stop, backward step, and then play for it to properly preview the ability. Just pressing play or stop and then play does not work.