In Minecraft Bedrock edition and Minecraft Dungeons, the ominous banners equip on raid captains’ chestplate slot. In Java editions, the ominous banners equip on raid captains’ helmet slot, and the banner pole is too short.
MC-254134
Raid captain's banner misplacement and the pole is too short(Raid captain)
Resolved
Invalid
1
Parity issues are only accepted if they're new in 1.15 or later, and only between bedrock and java, not dungeons.
The lack of special model (longer pole) is a change request, and not a bug; all blocks render like their item forms when in the head slot; only armor has special models.
Images from the wiki are community-made and can contain mistakes, you should avoid using them to advocate your report.
It intersecting the head should be a valid report, if standalone.