The platform behavior resolves collisions in such a way that there is a small gap sometimes.
By zooming in on small objects the gap will be more noticeable. A workaround could be to scale all the object sizes up so the relative size of the gap is smaller to make it less notable. I’ve also seen people shrink the collision polygon slightly to hid the gap, but that could shift it visually overlapping slightly.
Another option could be to make the platform movement yourself with events, and do a different strategy to not have the gaps. The behavior resolves collisions by repeatedly moving in steps till the object doesn’t overlap. With your own collision resolving events you could control the size of the steps to have a smaller gap. Or do a tiered approach by first resolving with bigger steps then a few more passes with smaller steps.
Also depending on the shapes you collide with it may be possible to use the geometry itself and calculate the exact position that the objects precisely touch.
Anyways, just some ideas you can do on your end. Filing an issue is also an option that may or may not result in an improvement in the behavior. But it would get the dev’s opinion.