List of Functions doesn't display automatically when typing function name in "CALL" command

When entering partial name for the function name in CALL command, the dropdown doesn't pops up automatically so user think the function doesn't exist, however if clicking manually on the dropdown, the functions are displayed.

It's better the list to be displayed (same as locators dropdown) so user would know that the function exists.

Below a partial text of function is typed in but by default the dropdown list doesn't pop up.

After clicking the arrow key, user can see the list:

it's better the list pops up automatically same as locator dropdowns.