Hi there I am the developer of Euphoria Patches and I just found out that if you enable shadowBlockEntities the Ambersol rays behave very odd and broken.
In the video I show how it happens with BSL by default and disabling block entity shadows fixes it. With Complementary enabling entity shadows enables both entity and block entity at the same time also breaking it.
After I show in Euphoria Patches (default settings here aka the same as normal Complementary - it is just my coding environment) that if no settings are changed and I remove the line shadowBlockEntities = false and reload the shader the issue starts to happen. In Complementary ENTITY_SHADOWS_DEFINE is by default -1 aka it is disabled. If remove the explicit statment to disable block entity shadows the issue happens. I hope this helps :)
Below I attached a video showcasing what I described above

i was wondering what was doing that i got sick of trying to figure it out to report so i gave up it really is a pain in my ass

p.s it also happen outside shaders so theres that too it's a really agitation