I believe you, in complex software there's always something that can be addressed. Still an example would be helpful, to prioritize. Otherwise the problems bothering you might not get fixed. It's easy to change/fix "something" - but is it one of the "many elements" you have problems with?
cor3000 ( 2020-05-13 00:29:55 +0800 )edithere an example adding a listbox via apply... does this flicker on your side? can you add what's missing to make it "flicker"? https://zkfiddle.org/sample/2v9156a/1-add-listbox-via-apply
cor3000 ( 2020-05-13 00:41:58 +0800 )edit
any example demonstrating your case? e.g. on https://zkfiddle.org/? I'll increase your karma so you can post a link
cor3000 ( 2020-05-11 14:44:05 +0800 )edit