The tall grass can generate inside pink petals in the cherry grove biome. It is invisible but you can notice the hitbox that it highlighted, which is visibly shown that it generated in pink petal flowers.

Step to Reproduce
1. Set the randomtickspeed to 0.
2. Find a cherry grove biome.
3, Look for a field of tall grass in between the pink petal flowers.
4. Find the odd hidden block that is shown the hitbox above the pink petals.

Observed Result
You will find that odd block that is generated.

Expected Result
It shouldn't generate one.

Example:
Seed: 4975161065323752093
Coords: 342 108 -2760