Issue:

If you set the motion of an armor stand that has {NoGravity:1b} the armorstand does not move. The motion does countdown like it normally would but the position is just not affected

Expected behavior:

The motion of an armorstand should always update the armorstands position this should not depend on the NoGravity nbt tag 

How to reproduce:

1.  Summon 2 armorstands, 1 with {NoGravity:1b} and one with {NoGravity:0b}:
2. /summon minecraft:armor_stand ~ ~ ~ {NoGravity:1b}
3. /summon minecraft:armor_stand ~ ~ ~ {NoGravity:0b}
4. Update the motion of both armorstands:
5. /execute as @e[type=armor_stand] run data merge entity @s {Motion:[0.0,0.5,0.0]} 
6. Observe that only the armorstand with {NoGravity:0b} moved upwards