Scores displayed in the "belowname" scoreboard slot disappear if an entity rides the player

Partner Rank: 3 (Normal)

Partner Team Reporting: Oreville Studios

Verification builds: 1.19.31.01_rc0

Summary:

If you display a scoreboard above the player's head by running

/scoreboard objectives setdisplay belowname

the score will disappear when an entity starts riding the player.

Impact:

We use the belowname slot to display scores to nearby players. If an entity rides the player, we lose the ability to display that information to other players in an easy to use way. This impacts content in development, and is unlikely to impact live content.

Repro Steps:

The repro steps can also be viewed in the video linked in this report.

1. Create a new world (superflat preferred for testing).
2. Invite another player into the world.
3. Make a new scoreboard objective by running: /scoreboard objectives add test dummy.
4. Run /scoreboard objectives setdisplay belowname test.
5. Run: /scoreboard players set @a test 0.
6. Observe the score above the player's head.
7. Spawn a parrot and tame it on the other account in the world.
8. Make the parrot ride the player on the other account who tamed it by running: /ride @e[c=1, type=parrot] start_riding @p[rm=1] teleport_rider
9. Observe the score disappear.

Observed Results:

The score above the player's head disappears.

Expected Results:

The score above the player's head remains visible.

Screenshots/Videos attached: Yes (https://www.youtube.com/watch?v=ehkciEuySEI)

Regression Builds: Unknown

Notes: N/A