idk how much it helps, but it happens regularly now.
and there are no other mods for belts.

The mod Electric Powered Belts (0.1.2) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event ElectricPoweredBelts::on_tick (ID 0)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function 'index'
__ElectricPoweredBelts/control.lua:55: in function <ElectricPoweredBelts/control.lua:35>

my list:
"base"
"elevated-rails"
"quality"
"space-age"
"aai-containers"
"aai-industry"
"aai-signal-transmission"
"alien-biomes"
"alien-biomes-graphics"
"bullet-trails"
"combat-mechanics-overhaul"
"EditMapSettings"
"ElectricPoweredBelts"
"EpicArtillerySounds"
"equipment-gantry"
"flib"
"fluid-connection-indicators"
"Fluid-level-indicator"
"grappling-gun"
"informatron"
"Inserter_Config"
"IondicatorsClassic"
"jetpack"
"PlanetsLib"
"pollution-scaling"
"Redrawn-Space-Connections"
"robot_attrition"
"shield-projecor"
"show-max-underground-distance"
"SpeedControl"
"squeak-through-2"
"Tiered-Solar-System"
"underground-pipe-pack"

Hey! Figured out a way to fix this - I'm assuming this is happening when something is crashing into the belts - since that's what caused it for me.

I've made a PR for this - so hopefully this gets fixed - but if you want to fix it in the meantime go to data-final-fixes.lua in the mod zipfile, and everywhere there's a

            collision_box = nil,

replace that with

            collision_box = v.collision_box,
            collision_mask = {layers = {}, colliding_with_tiles_only = true},