Summary:
After giving a banner a pattern and then washing the pattern away using a cauldron, the banner no longer stacks with a blank banner. The only way to get the banner to stack is to place and break it.

Steps to Reproduce:

1. Obtain two blank banners of the same color
2. Add a pattern to one of them using the loom
3. Wash away the pattern using a cauldron with water
4. Try to stack the banners

Observed Results:
The banners don't stack.

Expected Results:
The banners should stack.

Video:
Minecraft Preview 2024-03-22 10-36-26.mp4