Rain/snow go through chorus flower and chorus plant

Rain/snow can go through chorus flower, which doesn't make sense because chorus flower is a full block. This allows things (such as button, pressure plate, lever, etc.) to place on chorus flower. This also works for chorus plant though this may intended.

Steps to Reproduce:

Step 1: Copy the setup (see below).
Step 2: Use "/weather rain" to summon rain.
Step 3: Now watch out to see how rain interacts with chorus flower and chorus plant.

Observed Results:
They go through.

Expected Results:
They have been blocked.