In our company we use one Agile Board to manage more than one project. Until now we had to use Quick Filters to filter all visible issues for e.g. a single project or a single version.
Those Quick Filters do never apply to Epics, which is not very user friendly, because when I filter for a single project or a single version, I don't care about unaffected Epics. Having to pin a single Epic in a haystack of Epics is nearly unusable.
The same goes for Versions (still via Labs). When I select a version, I wish all Epics to be filtered for this selected version. Also as long as I have to filter for a specific project via Quick Filters, I wish those filters to apply on Epics and Versions as well.