[stand-by] Image viewer cashes Wings3D on Linux

[nigec]

Wings v2.2.5 shuts down after the render completes, the rendered image displays then Wings closes expectantly
The scene renders stand alone fine
Just create a scene with a simple object, uv and lights and try to render with 800x600 res

Persistence of Vision™ Ray Tracer Version 3.7.0.8.unofficial (g++ 8 @
i686-pc-linux-gnu)

PRETTY_NAME="Debian GNU/Linux 10 (buster)"
NAME="Debian GNU/Linux"
VERSION_ID="10"
VERSION="10 (buster)"
VERSION_CODENAME=buster
ID=debian
HOME_URL="https://www.debian.org/"
SUPPORT_URL="https://www.debian.org/support"
BUG_REPORT_URL="https://bugs.debian.org/"