Charts app is saving VFR flight planns as LowAlt, when they should be saved as Direct. When MSFS imports, it behaves as a IFR imported flight plan.
<FPType>VFR</FPType>
<RouteType>LowAlt</RouteType>
Should be:
<FPType>VFR</FPType>
<RouteType>Direct</RouteType>
Simbrief was corrected earlier, but the correction didn’t make it into the last update of Charts.