When the demise generator acts, it creates a particle cloud entity. This entity seems to never be killed. I was trying to pinpoint the source of some massive lag on my server and carpet revealed that there were nearly 4000 entities named extragenerators:generator_area_of_effect_cloud upon deletion of which the lag cleared up.

Version extra-generators-1.1.1-BETA+1.18, playing on AoF 5, the generator is connected to IndRev Lazuli Flux Container via Cable Mk3

Same issue. Used the following command to clean up: /kill @e[type=extragenerators:generator_area_effect_cloud]