Hi there!
My user defines tags in a multidropdown (can be one or many).
I’d like to display in a repeating group results of entries that have ALL the tags listed in the multidropdown (not OR!).
I tried so many combinations, using :filtered or :merged or nothing at the first level, but I can’t manage to make it work.
Any advice? This is key to my app, completely stuck 
Replace ‘merge’ (all=or) with ‘intersect with’ (and) thing. Replace ‘first_item’ of using tag_list_contains_ multidropdown_tag_value:first_item with item=2 and item=3 for the two other ‘search for’, and so on (if you add more tags).

IT WORKS!
Many many thanks!
Had to not forget to tick the “Ignore empty constraints” otherwise it would work but that’s exactly what I needed, many thanks!
Useful indeed to know, huge difference.
Thanks again 