I think your missing some water tiles I cannot animate the middle wave fill tile there is only once instance of it.
Thanks for clarifying! The animated tiles are in a separate folder named “animations”. I suspect you might be looking at one of the static tilesets in the “tiles_and_assets” folder instead. Sorry if that’s a bit confusing, the tilesets in that folder include water tiles as well because they’re identical to the ones in the standard version, which doesn’t include animations.
The reason I kept them in the plus version is so people who started using the standard version can switch without breaking their existing tilemaps, they only need to replace or add the tiles that are animated.
I hope this helps! Let me know if you run into any issues.