Converting a normal Pillager to a captain doesn't give them the banner correctly

Partner Rank: 2

Summary:
Converting a normal Pillager to a captain doesn't give them the banner correctly. The loot table is applied, and on reloading the map the banner is visible, indicating this is a visual bug.

Impact:
The whole point of the project is to showcase new village and pillage mechanics. Being unable to spawn a Pillager Captain makes this exceedingly difficult to control and convey to users.

Repro Steps:

1. Use attached pillager behavior file and open 1.11 world
2. Summon a pillager
3. tag the pillager with "captain"

Observed Results:

The pillager redraws his crossbow so you know the component was added correctly. If you reload the game, the same pillager now has a banner which was not visible before. When killing it before reloading you still obtain bad_omen which is more proof that the component added correctly.

Expected Results:

The newly promoted captain should get an illager banner when they are tagged.

Screenshots/Videos attached: Yes

https://www.youtube.com/watch?v=NaQ24FW-vEM

Regression Builds:

New Feature

Notes