Hi,
Just checked, and there was a little ‘issue’ with shadows in develop (and in v1.1.08 actually) where the light was always at a fixed point when drawing shadows – I must’ve been testing something. Fixed now in develop branch and apart from that all appears to be working as usual so I’m not sure what’s up with your version. Have you rebuilt everything, updated drivers etc? My linux setup has a choice of open source/proprietry drivers perhaps try changing this?
Trying v1.1.09rc1 next. Which branch should I be working with these days?
For what your’re doing, the latest itch.io ‘releases’ might be the way to go. Release candidates should be generally OK too.