Unable to delete some objects

[JoshuaPearce]

Issue

When trying to mass delete or single-delete objects, it frequently hits a snag: (console) Uncaught TypeError: Cannot read properties of undefined (reading 'items')

This is not mod specific, but definitely mod related.

Replication

1. Try to mass-delete the large blob of objects around the smaller gigantic hole at the northern edge of the grass fields. (This is the easiest way to trigger an error).
2. Disable foundations/etc so you can see just belts. There is a belt highlighted in an included image which causes the problem individually. It seems to behave better if the belt attached to it is changed to a vanilla belt. (the attached belt was from translucent belts by Andre, but please note this error also occurred before I ever used that mod.)

I get the same error (shown in images) whether I single-delete that belt, or mass delete some other area.

Relevant save files: https://drive.google.com/drive/folders/1sD05f8lRVdm-XwjhYAPHexRFpJMCV-cL?usp=sharing