As you bonemeal a small dripleaf plant, it can break any block above it. Including bedrock, end portal frames, end portal blocks, and any other block.

Steps to replicate:
1. Place a small dripleaf plant

2. place the block you want to break above it

3. Bonemeal the small dripleaf plant

4. If the plant is bonemealed and it is more than 2 blocks tall, it will break the block above it

(You may need to repeat this, as the small dripleaf plant can be bonemealed into 1 or 2 high big dripleaf plants, and those are not tall enough to break the block above)

I apologize if this bug is considered as a duplicate of MC-213780 I did not consider it as such.