Hello,
It's first time that I'm faced of this strange behaviour with JQL.
I have a multiselect customfield "features" is not selectable on Basic JQL

whereas on Avanced filter the same field is selectable

If I select customfield and add a value criteria, I receive the result

And if i go back on Basic, the search result is complete but in the JQL the customfield doesn't appear

I tried with other multiselect customfield and I don't have this behaviour.
Do you know the reason why? And how to solve it.
Thank you
Cedric