Custom query and "for all projects".
If I create a new custom query (e.g. status == open, version != backlog) with "for all projects" ticked, as soon as I save it, the second filter (version != backlog) is lost. It's not applied to the list of issues, and if I edit the custom query, the second filter is missing.
This does not happen if I do it in 2 stages. I.e. create the custom query without ticking "for all projects" and save it. Then edit it, enable "for all projects" and save it again.