Did anyone try a one wallet MN setup, instead of Hot-cold (local-remote) wallet setup as described in the tutorial?

I mean - try to run a masternode and control it using the one single hot wallet. That is a standard setup, which should be the simplest one... and it works on all other MN coins I have setup before.
Yesterday I spent hours trying to make it work - to no avail. It just throws stupid errors, like "Not capable masternode: cannot connect to x.x.x.x:9009", or just "Not capable masternode: " - without error description.
Gave up yesterday. Today moved the controlling part to the remote wallet - boom, it worked immediately.

So I suppose there is either a bug in HLM MN implementation (as the single hot wallet setup works for other MN coins); or an intended security limitation - it this case it should be documented, and the daemon should throw some meaningful error message - like "Not capable masternode: only local-remote setup is supported." or something better...

Just wanted to report this, in case if it's not widely known and discussed in slack/telegram/discord already