There’s an anomalous behaviour which can make Listpickercustom components (and probably analogue listviewers) unreliable.
Try the enclosed aia file.
If you try to open list Signals you can see two items , the other list is empty.
If you try to add to the latter list an item, selecting and CLICKING IT in former list , it works as expected.
If you then try to remove an item selecting and CLICKING IT in My selection list, it works as expected too.
if you just open a list and DO NOT MAKE any selection, just close them back-pressing , the action is performed as a selection was made, moreover if you look at label text it never change its content (maybe the lost focus is not registered or it does not report correctly ).
So it ends in unexpected and unwanted results.
test.aia (83.6 KB)