lxc devuan container

Good day, I've been deploying Devuan 4.0 images (pve 7.4) the past 4 months, and had noticed `byobu` strangeness, but only this week it caused me problems that I had to get to the bottom of it. I've tried all the settings in the GUI panel for UNprivileged containers, and eventually...

Im using an ascii template I created (by installing a VM off the iso, then tarring up what was in the filesystem...), I've had success using it on older Pve (5.0?) or either I missed this warning or it's new on 5.2 - maybe it's ignorable. extracting archive...