Khurshid Alam, yes, it is MATE. Here is an Apport output, sorry I did not realize to attach it earlier.
** Attachment added: "Apport.log" https://bugs.launchpad.net/ubuntu/+source/indicator-datetime/+bug/1860994/+attachment/5323320/+files/Apport.log -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to indicator-datetime in Ubuntu. https://bugs.launchpad.net/bugs/1860994 Title: Indicator menu is too wide Status in indicator-datetime package in Ubuntu: New Bug description: The indicator's context menu does not appear to have a maximal width. This leads to an unattractive appearance when the show-events key in the com.canonical.indicator.datetime schema is true (default value) and there is an event with quite long name. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/indicator-datetime/+bug/1860994/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
