[MC-135809] Armor stands with Marker tag can still activate pressure plates

The bug

Armor stands that have the Marker tag set to true still seem to be able to trigger pressure plates in certain positions.
I have included a world download with some options for better visualizing this bug, and also made a video for demonstration: https://www.youtube.com/watch?v=9Kzbj_bG2Zw

How to reproduce

Place a pressure plate
Stand on it
Run this command:
```
 /summon minecraft:armor_stand ~ ~.12 ~ {Marker:1, NoGravity:1} 
```
The NoGravity tag is not required, but it is used here to show the effect, otherwise the pressure plate would only be activated for a short moment.