Steps to reproduce

1. Create a file/folder
2. Share the file/folder with a user
3. Set an expiration date for user (behavior included in PR [For 10.4] Include expiration option for user and group shares #36573)
4. Delete the date clicking on the cross

Expected behaviour

Calendar should not be shown

Actual behaviour

Calendar is shown even when finally the expiration date is deleted

Server configuration

ownCloud version: 10.4.0 RC1

Browser version

Safari Version 13.0.4 (13608.4.9.1.4)

@felixheidecke @phil-davis JFYI