Text backgrounds overlap with eachother in chat

Some time ago, I noticed how the text background in a chat message overlaps a bit with the other ones.

Steps to Reproduce:

1. Set your chat opacity to something a little bit transparent (like 50% or 35%)
2. Send at least 5 messages in chat so you can notice.

Observed Results:
The text backgrounds overlap and you can see where it starts and where it ends.

Expected Results:
The text backgrounds don't overlap and you can't see the connection point.