How to move an element into a group of elements?

Question

Figma

Hello, I'm facing a strange problem. There is a group of elements, it is not possible to drag the desired element into it.
I'm trying to move the "vector" element to the group where the arrow points in the screenshot. The group itself is unlocked.
Moreover, it turns out to move to other groups, but not to the right one. With what it can be connected?

Answer 1

Found a solution. You need to select a group, and then click "detach instance"