XPS 9310 Hotspot dropping

Is there a way to stop my xps from losing its connection to my iPhoneX?   Its a bit odd in that it seems to disappear after awhile and then i can't re-add it as it doesn't show up when i look for a network to join.  I've read that sometimes battery mode puts the wifi to sleep to save power but i can't find anything in the power plans to prevent this.