Tested using Evilnat 4.88 and MGZ test build 1.41 (with XMB layout)
A workaround I found for this issue is to change to a different UI style (like coverflow), and then change back to XMB-style, which makes the inserted disc and the UI to show up.
This is also true for copying games using Managunz itself, i.e. the game doesn't show up until Managunz is re-opened. I suggest adding a button combo to be able to rescan.
Tested using Evilnat 4.88 and MGZ test build 1.41 (with XMB layout)
A workaround I found for this issue is to change to a different UI style (like coverflow), and then change back to XMB-style, which makes the inserted disc and the UI to show up.