After further testing was not able to replicate the non burning but could replicate them not doing any damage. I have also tried using the transition from night to day but didn't change anything.
This issue still remains in realms 1.6.1 however they function properly on a normal world.
After further testing was not able to replicate the non burning but could replicate them not doing any damage. I have also tried using the transition from night to day but didn't change anything.