It happens on minecraft 1.21.1, neoforge (neoforge version 21.1.80)

Also, I cannot make the red pandas mount my shoulders no matter how much I try. They can´t be fed eggs or sweet berries too.
Apart from that, I am not sure if it is intended but no matter how much you annoy a sleeping red panda, it keeps like that, lol.

I think the image was really bad, so i took another

Also, don´t worry about the GUI, I am using another mod that changes it so as to be the same as the legacy edition one.