Contents of shulker box display incorrectly with trimmed and un-trimmed armor

When a shulker box with trimmed armor inside is opened the player will see which slots contain trimmed armor [image 1]. When the player opens a different shulker box with un-trimmed armor (and the shulker box is not named) the shulker box will display trimmed armor [image 2]. When the player opens a 3rd different shulker box with un-trimmed armor (and the shulker box is named) the shulker box will display the correct contents [image 3].

The above is true no matter the dimension, or after player death. The shulker box will only display the correct contents if after a relog. However, once a shulker box is opened with trimmed armor then the above takes affect again.

Similarly when the player views the armor slots in their inventory. Visually it will be correct (assuming no armor trim on the player's armor) but once a shulker box with trimmed armor is opened then the player's armor inventory slots will display as though it is trimmed armor.