Can’t take item from creative inventory to personal inventory

Steps to Reproduce:

1. In creative inventory, tap an item to select it
2. switch to personal inventory 
3. tap on a slot in personal inventory 

Observed Results:

The selected item can’t into personal inventory slots

Expected Results:

The selected item will into personal inventory slots, even though the slot has been occupied.

It can work before 1.21.20 update, but now it can’t work.