MillMage connection won't work with hostname

I am running Pro RC3, but it happened with all versions. When I try to use a hostname instead of the IP address, MillMage won’t connect. It works fine using the IP address. I can also connect with the hostname through the Web UI. I have tried two different PCs. I can also open a command prompt and ping the machine with the hostname without issue.

I am running a LR4 with FluidNC.

Thanks for reaching out.
I noticed that too and reached out to the devs to have them look into this.
For now, you can still connect via IP.

Aaand, we have a working fix for the next release!

Thanks again for bringing this to our attention, Vincent.