I have about 15 next-gen Kanban projects set up in Jira.
I have also created a "Classic" project called "All Projects" where I have a filter that imports all of my next-gen project issues:
project in (EATUPAD, UPHK, UPSG, UPESP, UPNETH, ALL, EATUP, ENQ, INTRA, UPAUS, UPCHINA, UPDUBAI, ECOM, UPIND, UPUK, UPUSA) ORDER BY Rank ASC
This is all working fine. I then created a scrum board in my classic project and all the issues are showing in the backlog as expected. Now when I drag issues into Sprint 1 it only seems to stick for 2 of my next-gen projects. All other projects the ticket has been taken out of the sprint when I refresh the page.

