Are you using RV Trip Wizard (web tool) or the RV LIFE GPS app? The GPS app should not shut down the screen during navigation. The browser based tool, RV Trip Wizard, is not a navigation tool, so it will allow the screen to blank. There would be no reason to be running RVTW during the journey.
2015 Tiffin Phaeton 42LH - All Electric w/tag
2016 Jeep Wrangler Unlimited Sport