There were two Grind to any Fingerflip on this level, but only the first one registered.
Ideas
Someone in the discord community has found a work around.
If you flip trick into a FS 5-0 and Impossible into another grind, then flip trick out it works. One of the combos that worked is:
Nollie kickflip - FS 5-0 - Front Foot Impossible - Nose Grind - Nollie Kick out
It’s worked for me and a few others
This dumb combo actually worked haha