Matrix

Title. Key management is so not intuitive at all. You have your session verification key in case you have no access to another session. Fine, i totally understand. Then you have E2E room keys you can either backup on your homeserver or in a file. Fine, except not so much. I exported my room keys to a backup file and deleted them from my homeserver. I signed out of element completely. I sign back in just fine, i verify my session with my session verification key just fine. I import my E2E room keys and see 32/32 keys imported success. Great. One encrypted room shows my historyperfect, the other "Waiting for this message, this may take a while". Exactly why is this? Every key imported fine so why arent all messages in all rooms decrypted?