About difference between Ctrl+V and Ctrl+Insert shortcuts for inserting

For a long time ago I noticed, that in some situations Ctrl+V and Ctrl+Insert during adding citation work differently.
If one moves to a reference field and cursor is blinking (flashing), a portion of the text can be inserted by both shortcuts (Ctrl+V and Ctrl+Insert). However if cursor isn't blinking (but the field is selected), only Ctrl+V works.
E.g., here it is possible to insert only by Ctrl+V:

If cursor blinks, Ctrl+Insert can also be used:

Certainly, it is not a big issue, but it would be nice to unify behavior of these shortcuts.

Ctrl+Insert doesn't work for

Ctrl+Insert doesn't work for me. Only Ctrl+V works.