On a specific seed, the tree in the entrance of the trial chamber generate with his logs replace by cactus.

You can reproduce the bug by doing the following steps :

1) Go to Minecraft Bedrock Preview 1.21.10.23

2) Create a world with this seed : -4980095369841872170

3) Go to this coordinates : -374 -21 765

You should end up in the entrance of the trial chamber and see the glitched tree.