Hello Jimmy,
To clarify, the Inactivity Timeout from 1-500 minutes got inadvertently reduced to 1-10 minutes in 9.8.0 GA and 9.7.1.0.32. Earlier versions as well as 9.8.2.0.15+ have the previous 1-500 minute maximum value restored. You might find a network to client contact (ping?) at under 500 min intervals will keep your devices connected.