May be, You probably have the setting "Fetch user data on first access, then keep in sync" enabled. If you want to fetch the other users from your user directory then disable that option and run the usersynctask of the user directory connector.
The main reason for this is that Group Policies have been applied in IE, which then interfere with functionality. Symptomatically this issue would look more like a system side issue rather than Qlik Sense issue.
IE11 does support websocket, so it should be installed. I think it is more likely that your IT has applied a group policy that blocks the websocket communication in IE11. Qlik Sense (and any webpage using websocket) will unfortunately not work until you have resolved the blocking.
And, to work with Chrome, you have to enable "Full Browser and Small Device Version" in the publisher task. With out them you don't see any dashboard in Accespoint.
Don´t Forget !
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