Expected Behavior

When carrying a banner over to a new coordinate, I expected the banner to be placed down when right-clicking.

Actual Behavior

The attempt to put down a banner in a new spot has resulted in an error message in chat asking me to clear my carryon slot and to report the bug. Instead of the banner I picked up, an invisible banner has been placed on the new spot, while my hands retain the original banner. The banner has no texture/model but it retains its outline highlight thing when hovered over. The original banner can be put down successfully if I put it back to its original coordinate. The invisible banner can be mined and thus duped if replicated over and over.

A friend could replicate the below steps, however when asked if he could see the invisible banners I put down, he said no. When he was the one replicating the steps, I could not see his invisible banners, but he could mine them like I could. It seems that the banners are visible only to the player using Carry On on the banner, though once mined, the banner becomes legitimate on future interactions.

When my friend rejoined the server, he was suddenly able to see the outline of the invisible banners, however they were also absent texture/model-wise for him. He could mine them as normal.

Also, there's no actual link in the error message despite it saying "here".

Steps to Reproduce

1. Make a banner and put it down (we had an ominous banner so we used that, but I'm not sure if this is relevant)
2. Pick the banner up using the Carry On button.
3. Place it on a different coordinate.
4. You'd receive the error message here and fail to put down the banner, but an invisible banner will be placed on the attempted coordinate. You can repeat this on many new coordinates in one go, to create multiple invisible banners.
5. Place the banner back to its original location.
6. Mine the invisible banner.
7. You now have an extra banner, which looks nothing like the original banner. When attempting to pick up the invisible banner, the same behavior happens from start to finish.

Version of Minecraft, Carry On, Forge

Minecraft version: 1.16.3
Carry On version: 1.15.1.7
Forge version: 34.1.17

Screenshots encouraged