I had the same problem in 2019a and although I searched the internet and tried every "solution" that I encountered, it does not change. It's funny that everybody else is fine with this weird thing.
Only solution that I found is a workaround. You can create the shortcut of the matlab.exe and then right-click, properties, write the path you wanted into "start in" field. If you use that shortcut to enter MATLAB, it should work.