I've noticed as a mobile user (jerboa, liftoff etc) when searching for and using communities in this instance they don't have an image representing the community like most others do, just a blank space. I believe adding these would help with discoverability/readability, assuming its not a problem just on my end.
I've added some icons for a few of the communities (that i'm a mod on) that have logos associated with their games to at least get something going. For anyone mod of any of the communities, feel free to change them if you'd prefer anything else.