for me, home connect direct works without any issues.
I tested it with a washer, a dishwasher and a coffeemachine.
Are there any errors in the log?
No, I traced it back down to a network issue. Cutting power for a few minutes for the dishwasher solved the issue.
That’s great. I was starting to get worried. 
I also had some network issues at one point. I have a lot of separate networks, like smarthome_untrusted. Unfortunately, communication between the networks wasn’t working. Luckily, it’s been stable for a while now. Back then, I had to restart the access point, and it started working again.
Maybe this will be of interest to some of you. I turned my “old” dryer into a smart appliance.
Hi everyone, I just released a new beta version of the Home Connect Profile Downloader. I’d love it if a few of you could give it a try and test it out.
I completely rewrote the whole app from scratch. The UI is much cleaner now and handles errors far better. On top of that, the app size is down to just 4–7 MB. It supports Windows, macOS, and Linux (both x86 and ARM).
Release page: Release 2.0.0-beta.1 · bruestel/homeconnect-profile-downloader · GitHub
README: GitHub - bruestel/homeconnect-profile-downloader at 2.x · GitHub