[0.15.32] Stack inserter is not able to pick item

[jormaig]

A stack inserter is not able to pick a single item entering an underground blue belt.

My save is a modded save but this part does not use any modded items.
Here's a recording of the bug https://gfycat.com/gifs/detail/Bountifu ... cornweevil

[Loewchen]

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