[0.17.62] Placing a chest at the end of a belt occasionally removes items on belt

[animagus_kitty]

I'll start by saying I'm 100% sure this is what happened, but I also cannot reproduce it.

I had two blue circuits at the end of a single-piece belt, because I was working on a mockup of a blueprint, and was going to follow it with two requester chests. When I placed the far chest, nothing happened, but when I placed the middle chest, the two blue circuits disappeared from the belt and (I think) reappeared in my inventory. I wasn't paying much attention to the count in my bags, but I did see the (+2 Processing Unit) floating text appear.

I tried ten or fifteen times to replicate the bug, and it didn't work, even with several different types of chests, but I thought I'd report it anyway in case someone else had noticed it.
My assumption is that the items did go back into my bag, because I saw the floating text, so this was definitely more in the 'weird' category of bugs than the 'problem' category, but here we are.

[Loewchen]

Well, if you manage to reproduce this let us know.