Hanging sign has a problem

1. The other day, after updating to 1.19.80, I activated experiments on a new world as I wanted to test some new features. I played with the hanging signs (cherry blossom to be exact), edited them, hanging them, everything was fine. Today, when I chose to play on the exact same world, I put a new cherry blossom hanging sign, played with it, edited it and so on without anything happening. When I go to the one I placed last time, when I started editing it, the interface was of an oak sign, not a cheery blossom one. (Sorry if I used some terms incorrectly, I let an attachment to show what I saw)