I'm using it in platforms, so I assume one of them is getting damaged

The mod Read belt contents, hold (all belts), read belt length (1.1.1) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event read-belt-contents-hold-all-belts-read-belt-count::on_object_destroyed (ID 174)
LuaEntity API call when LuaEntity was invalid.
stack traceback:
[C]: in function 'index'
...lt-contents-hold-all-belts-read-belt-count/control.lua:232: in function <...lt-contents-hold-all-belts-read-belt-count__/control.lua:222>