You can give the task page an URL with the id of the task : like Task1/{WorkflowUserTask/Id}
In a microflow you have to find the task id, you can use the java action getGUID from CommunityCommons for the task object. then you can create a complete url to jump to:
$AppURL + '/p/Task1/' + $UsertaskID
I normally use this in the start task email, so the user can click on it and is directed to it's task.
($AppURL can be created with java action GetApplicationURL, also from CommunityCommons)