EDIT: After making this report, I saw this was already reported 7 minutes ago, so this is a duplicate. The original report is here: https://bugs.mojang.com/browse/MCPE-168355
The new 184.108.40.206 Preview update brought a fix to the search bar on PCs. This made the search bar selected when opening the menu. However, this has a bug.
If you right click an item in the full search menu, it will go to the center of the search bar, not the mouse position. After moving your mouse, the item will go to the mouse position.
Steps to Reproduce:
- Go on Creative mode and open the search menu (make sure it's the full search menu).
- Right click any item and don't move the mouse.
The item you just clicked goes to the center of the search bar.
The item you just clicked goes to your mouse position.