@mid-kid
Loading gba vc titles fails for me on unlinked sysNAND 9.2 E and emuNAND 10.5 on 03DS.
On unlinked N3DS which uses the O3DS agb_firm from the agb_firmurl it works directly from sysNAND 9.0 E and on emuNAND 10.5 E with the game installed both on sysNAND and emuNAND.
I use the latest 10.4 firms and 6.0.0 agb_firms that are possible with your CFW.
When I launch the game I think the 3DS tries to "soft-restart" but the 3D-indicator stays on.
I also checked the installed firmware titles and everything of 9.2 E is correct except the DS whitelist.
Edit:
I found the reason, the survive-reboot feature also blocks the reboot of other titles than 3DS games, maybe some changes between versions broke the checks of the game type.