I have a lookup field with bi-directional links (both multiselect). 'Search and Auto-Complete' is enabled (Form A). On the other side of the lookup field (Form B), I want to enable 'Search and Auto-Complete' too ; but then, in the original field (Form A)  the 'Search and Auto-Complete' has been automatically switched to disabled. I did the reverse, and it's the same : actually 'Search and Auto-Complete' is possible in only one side.

Other remark about  the 'Search and Auto-Complete' with checkbox : when we click outside the field, the "dropdown" should disappear/be closed (as a classic dropdown does). We have to click on the selected values area (anywhere else) and then hit escape key.

Not really ergonomic for users

Cyril