The bug in the center has been notified

Hello Box: https://smartgroup.crm-onebox.com/ Some kind of bug is notified in the center: 150+ new notifications [file]17030[/file] are displayed, while clicking on the "bell" does not open anything and the box freezes completely for 1-3 minutes. Likewise, if you open the notification center app itself, it is empty [file]17031[/file] The problem is with only one user: https://smartgroup.crm-onebox.com/app/contact/4/ - if you log in from the second, everything works fine. Tried: In the context menu: - Clear all notifications (without result); - Mark all notifications as read (without result); Automatic actions once a minute: - Action "Clear Center Notified to selected users" - partially worked. 500+ were notified before him, the action cleared the notification up to 150 and further cannot clear them. Please help to solve the problem.