Nametag and Locator bar sometimes visible when sneaking

Both Problems are very similar so I put them in one report.

1. Problem: When a Player is behind a wall under a slab, they automatically sneak and therefore they disappear in the locator bar, but their name is still visible.

   1. Steps to reproduce:

      1. One player hides behind a wall and sneaks underneath a slab but lets go of the sneak button.

      2. The other player is on the other side of the wall.

   2. Expected Result:

      1. The locator bar dot should still be visible because they are not actively pressing the sneak button. (or change so that both are invisible, that would be better)

   3. Actual Result:

      1. Player name still visible, locator bar dot is invisible

1. Problem: When a Player is behind a wall in a lying position (in a 1 block high gap) and they hold down sneak, their name disappears, but the locator bar still shows them.

   1. Steps to reproduce:

      1. One player hides behind a wall and goes into a lying position (e.g. with trapdoor) and holds down sneak button

      2. The other player is on the other side of the wall.

   2. Expected Result:

      1. Both player name and locator bar dot go invisible

   3. Actual Result:

      1. Only player name goes invisible and the locator bar still shows their dot.