Crash when cube is teleported

[O5MO]

Happens even after rebuilding teleporters after uninstalling all mods. Couldn't reproduce in a brand new world, so i provide a save file. To reproduce the issue, simply put the cube into the teleporter.

The mod Ultracube: Age of Cube (0.6.9) caused a non-recoverable error.
Please report this error to the mod author.

Error while running event Ultracube::on_tick (ID 0)
..._/scripts/if_this_crashes_you_have_incompatible_mods.lua:6: Ultracube error: unexpected state. This is almost certainly because you are using another incompatible mod.
First, try disabling other mods and see if the problem goes away. If you report this error, you must include your mod list.
The internal error was: LuaEntity API call when LuaEntity was invalid.
stack traceback:
	[C]: in function 'error'
	..._/scripts/if_this_crashes_you_have_incompatible_mods.lua:6: in function 'crash'
	__Ultracube__/scripts/cube_search.lua:1022: in function 'update'
	__Ultracube__/scripts/cube_fx.lua:612: in function 'tick'
	__Ultracube__/control.lua:330: in function <__Ultracube__/control.lua:327>

teleporter crash save.zip

This is the same issue as https://mods.factorio.com/mod/Ultracube/discussion/68777ec828c66b1edb2b0be9, but since i couldn't upload a save file there, i created a github issue.

[O5MO]

teleporter reproduction 2.zip
Managed to reproduce it in a test world, but the problem is inconsistent. In the save file it consistently crashes, but if cube is teleported at a different point in time, either "optimized cube control routines failed" or "cannot find the ultradense cube" or both messages are displayed instead of or with the actual error.
The cause of the issue seems to be that an invalid LuaEntity ends up in storage.entity_cache, specifically in the inventories table, but i haven't found why this happens yet.
Attached below is a screeenshot of the debugger in vscode, showing storage at the time of the error. There is an invalid LuaEntity at index 10 in inventories both directly in entity_cache and in the chunk_map.

[O5MO]

And after running the following commands, the entity with a unit_number of 10 is cube-experimental-teleporter-pod
/c ents = game.player.surface.find_entities_filtered{}
/c for _, entity in pairs(ents) do game.print(entity.unit_number) game.print(entity) end

Commenting out the destruction of the rocket and the cargo pod in teleport.lua:132 makes the crash not happen immediately after teleporting, but with some delay, probably when the rocket/pod has ascended. This suggests that the issue is purely in handling of the entity cache.