Buggy personal light sources

[Xopie]

Hi, new to P1999 and I'm experiencing an annoying bug with personal light sources. My light source seems to decide whether or not to work entirely randomly. Sometimes it works perfectly, sometimes I have no light at all, sometimes (quite often) my light source flickers on and off repeatedly. If I have multiple light sources it will flicker between them, even if one is much higher priority. For example, I have a fire beetle eye and a small lantern, but no mater whether I'm holding one, or have them both in my inventory, they will fight for supremacy, or simply not work at all.

Cheers for any help anyone can provide. Apologies if this has been discussed before, but I wasn't able to find mention of it.