Field item relation : wrong behavior with select list

Hello,
I have a wrong behavior (in the form) with the select list of "relation item" field : if the list is near the bottom of the screen when I click on it (to select an item), it shut down instantly and select a random item (maybe one of the first of the list), rather than opening up toward the top direction.

Is there a way to fix it ?

I have tested it on Firefox only.

Thank in advance.

Hello


does the issue occur in backend too ?
or only in frontend ? or both of them ?


please create a short screen video capture, then put it online
you can use monosnap.com/
and provide a URL link to it here

Only in frontend.
Backend works good.

It's difficult to make a screenshot because wrong behavior is not static.
But here is an attempt of screenshot to explain what work and what don't work :


Thank again.

Note that it don't work because the list size is too big to fit in the screen.
If I scroll down the page, and if the last two blocs is higher, it works.

Hello

i think this is because of frontend template CSS

Create a hidden menu item for FC submit form with menu alias menu-alias1
and assign to it protostar template

The open it via
https : // domain /menu-alias1/

does it work ?
after you check the above , you can send a PM with site access
even if it does work with protostar, i will still look at it

How can I assign protostar template to my menu item ?
I can only assign it to frontend templates, there is no backend template in the select list. :blush: