Dolphin core bad results with Wiiware titles

This core is pretty unstable when running Wiiware titles (standalone games, not Virtua Console ones).

I’m either getting freezes when loading or when creating saves, graphical errors and glitches.

I tried Bust-A-Move (freezes on game save creation), Castlevania Rebirth (Graphics errors) and LostWinds (Crashes RetroArch).