I just set up Octoscreen on a Waveshare 4.3" HDMI touchscreen. Everything works, but the display constantly cycles between Octoscreen and the octopi login prompt.
I tried changing the login settings to autologin but then I saw two errors after my raspberry pi booted (Failed to start Octoscreen and Failed to start /etc/rc.local Compatibility......) and my Ocotoscreen never left the octipi login page and I had to start from scratch all over again.