we've got a curious problem regarding the e-mail notfications in SAP Netweaver WIKI. The problem only occures with some of the users, not all.
When they click to receive e-mail notifications everything seems to be fine. An entry in the database table for notifications has been created und the user receives notifications.
But after some hours the database entry disappears (deleted) and the user did not receive any notification in future until he clicks again on the button to receive notifications (only for the next few hours again).
The Wiki is on Netweaver 7.3 SP8.
Any help would be greatly appreciated.