Since 18.04 Ubuntu now supports color emojis right out of the box, this causes some problems with the teamspeak client. Whenever there should be an Emoji you get this huge space:
Name:  teamspeak.png
Views: 490
Size:  778 Bytes

Well, I'm not an expert. I only see that basically no other program I use on linux has issues with this, only teamspeak is doing this. This can be really annoying if you visit a server full of emoji-named-channels.