Powering root of high dripleaf plants does not stop the leaf from wilting

The large dripleaf plant has the redstone function to stop wilting, when its root block is powered. This only works however, if the dripleaf is only one block high. If it's any higher, the dripleaf wilts as usual. This makes the function pretty much useless.

Expected behavior:
Dripleaf plants higher than one block stop wilting, when the root block is powered.

Observed behavior:
Dripleaf plants higher than one block wilt anyway

Tested on both Bedrock and Java Edition