The bug
Summoned shulkers are no longer white. I assume this is working as intended and very likely a bug fix. However, as MC-107432 is still resolved as "Works As Intended", I created this ticket. This was probably caused by the fix of MC-111196.
To reproduce
1. Summon a shulker.
2. ❌ Notice that it is not white.
Expected result
The shulker would be white when summoned via command, as in previous versions.
Can confirm in 1.19.1.