Ubuntu 19.04 xrdp server terminating connection immediately

I just made a fresh install of Ubuntu 19.04 into a VM. Installed xrdp via apt. Left everything on default: I believe this is how my 18.04 worked perfectly.

However, trying to connect to this VM via Remmina or Windows RDP client fails. Remmina shows a bit more because it attempts reconnection and so the result looks like this:

The login screen appears, login dialog shows but then immediately the connection is dropped.

This loops indefinitely with Remmina, but doesn't even show with Windows RDP client.

Tried the same with kubuntu 19.04 but result remains the same.

Edit: Installing remmina from their next ppa fixes this issue and I can now connect to the host xrdp server:

sudo apt-add-repository ppa:remmina-ppa-team/remmina-next
sudo apt update
sudo apt upgrade    <-- I had remmina installed from standard ubuntu repos

This is the only relevant change I did in the last few days. Will test how windows client works too, but if it does, something must have changed on the host as well...