After finishing a den i tried to catch the pixelmon however it doesnt allow me. it just stays on the catch/dont catch screen and clicking the catch button doesnt even show to animation of a ball roll and remains on the catch/dont catch screen. It produces the click sound when clicking the catch button but nothing happens

Can confirm this, will be forwarding to internal! Thanks.

To add to this, it also does not work if you have a Poke Bag. I have an orange I found in a village on an item frame, so naturally I took it. Catching regular Pokemon works while having balls inside the bag, however, dens do not work with this. I figured I'd check the bug tracker to see if this was added to list of bugs. Would appear it doesn't work regardless if I'm using a bag or not.

I wanted to add to this since I was finally able to test a theory of mine. I just was able to catch a den pokemon by having ultra balls in my actual inventory. Can confirm this works, but having balls in the poke bag does not work.