Explained

The practical solution without using warp!

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Your problem in this scenario is not that it can not detect static objects but that nothing is entering the field but instead is already present. In turn, it does not send a signal to the emitter. Hope this helps!

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Was trying to build something factorioinspired, but then the object field was buggy...

EDIT:
The object field can't handle static objects like platforms or blocks. I'll have to find another way.