A pass should never disappear from the app, so this is a bug.
Do you have Android or iPhone? If iPhone, which iOS version?
Do you have the latest app version 23.1.0? (Go to More, scroll to the bottom.) If not, update the app and check again.
If nothing helps, please contact customer service and give them all details you have.
You're a victim of the fact that the requirements for the rail planner app have suddenly changed to iOS 13 instead of iOS 10. iOS 10 is still mentioned in the conditions of use, so it's not your fault.
Please mention all this to customer service and ask for a solution. They still have some time until 20 June, fortunately.
But as they are extremely busy-with the sudden current boom of post-covid travels (not yet for you mask-wearing Deutsche) and understaffed, it may take a while though.
I see that you are going to Sweden. Please be aware that the Eurail planner app says that reservations are mandatory on all trains in Sweden. That is wrong. Reservations are only mandatory on the high speed trains (SJ snabbtåg) and on the night trains.
If you have any questions regarding travelling by train in Sweden, feel free to ask and I'll do my best to answer.
I see that you are going to Sweden. Please be aware that the Eurail planner app says that reservations are mandatory on all trains in Sweden. That is wrong. Reservations are only mandatory on the high speed trains (SJ snabbtåg) and on the night trains.
Also mandatory on SJ Intercity trains and Snälltåget.
If customer service doesn't come up with a solution, they will have to pay your extra expenses. Another victim of the same bug, who is currently travelling, will have their tickets reimbursed:
So if there's no solution by the time you start your trip, you can always buy a paper Interrail from a Deutsche Bahn ticket office.