Arrow stops following me randomly

I use this app on my adventure motorcycle as my primary GPS.  I have my phone mounted with power in my tower.  The arrow will randomly stop following me.  It will still turn as I turn, but doesn't progress down the trail.  I stop, pull over, take off my gloves, click the target button off and on, it catches up and then works for awhile.... until it doesn't.  Kills the flow of a ride especially in areas with lots of branches and a pre-planned route I'm following.  The screen stays open, phone is not locking, battery is 100%, app is only thing on, settings are set to "always allow".  Still happens.