I placed minimap button bar over minimap and it works fine, i can interract with bar button etc until i click somewhere else on minimap, then bar simply dissapears, no ui errors.

Here is video example

Then i looked up the code in minimapbuttons.lua and found out if i set frame strata to MEDIUM instad of LOW (line 318) bar no longer dissapears.

Video

I dont know if that fix is correct but it works for me. Maybe you can do it the right way or just add option to select frame strata in config?

Better late then never. In v4-beta2 this will be fixed.

Live in https://github.com/nickbock/ElvUI_Enhanced_Again/releases/tag/4.0.0-beta3