Crimson and warped roots can be lit on fire and burn

Summary:
Crimson and warped roots can be lit on fire and burn away.

Steps to Reproduce:

1. Place down crimson and warped roots
2. Use a flint and steel on them

Observed Results:
The roots are lit on fire and quickly burn away.

Expected Results:
Crimson and warped roots should not be able to be lit on fire and burn away.

Video:
Minecraft 2020-05-23 14-05-49.mp4