Samsung is slow in fixing and complete their stuff. Although One Ui is better than ever but it still some annoying UI bugs. This is why Complete One UI build for. This app will provide System mods to fixing UI bugs that Samsung still ignore, complete Night Mode UI and moreover tweak the UI for better experience.

This app is Substratum based so you need these apps for it to work:

For S9/S9+ and N9:
Substratum - https://play.google.com/store/apps/details?id=projekt.substratum&hl=en
Andromeda - https://play.google.com/store/apps/details?id=projekt.andromeda

For S10/S10+ and other Samsung devices running One UI:
Synergy - https://play.google.com/store/apps/details?id=projekt.samsung.theme.compiler
Substratum Lite - https://play.google.com/store/apps/details?id=projekt.substratum.lite&hl=en

If you have any question go to this channel or XDA forum thread (please do not give low rate any ask here because I cannot answer that)
https://t.me/chat/IVyxzw8OttVkIEMLHhO__w