Finally able to post. Most of the bugs I mentioned seem to be fixed as far as I can tell. A huge improvement on the lag issue.
Flashcard: After you have answered the question in the old version you were able to click the pen icon, write (Img 1) and see the word you are writing, also had the delete key and done. It would be nice to have that back. I used that a lot on the words I get wrong, write it a few times, if I see it as the first word choice a few times I move on.
Bugs:
Stroke order, I'm still getting weird blank cards, or wrong words for the test. I did a test of 10 cards, and on the 11th card it came up with a word finally. (img 2-5)
In the fill in the blank test, after you have answered, the words sometimes disappear from the boxes.
As someone mentioned before I also get the lines while loading. For me it looks like the section of Pleco I'm going to loads then the slide in animation plays.
As for the new "Back button" options, none seem to work like in the old version. If I leave it on the default setting, when I'm in Settings or add-ons, hit the back button, I exit instead of going back to the dictionary (my only annoyance with this option). If I have the "Back to dictionary, the Exit" I sometimes get weird behavior of going from the dictionary to the flashcards, back to dictionary then exit. I think that is more like how the third option it to work.
Also with the loading of the sections. If I was taking a flashcard test, leave, and then click the Dictionary launcher (which I use now, explained next), I see the flashcard test popup then slide away to the dictionary. In the old version using the standard "Pleco" shortcut it took me back to dictionary, so I could use that and the flashcard launcher and had no problem jumping between the two. In this version if I'm in a test, leave, use the Pleco icon it takes me back to the test.