Snapshot 20w45a infinite candles bug

When I right click a candle on a cake, it spawns two more. This leads to infinite candles.

What I expected to happen was...:

I only found this because I was unsure of how to light a candle. I thought right clicking it might do it. 

What actually happened was...:
Instead, it spawned more.

Steps to Reproduce:
1. Place a candle on a cake and right click.

My reddit post that includes a video of the bug since the file was slightly too large to upload here.