Elytra texture showing other player's cape on Realms

• Steps to reproduce the issue

Two players playing on Realms. Both wearing a cape and elytra and standing near each other. The image shown in the inventory screen shows the elytra with the cape pattern of the other player.

• Expected result

Expected that in the inventory screen, the elytra shows my cape pattern

• Actual result

Actual result is that the inventory screen shows the elytra with the cape pattern of the other player