Dashboard gateways issues (disappearing or appear offline)

[GiantJack]

Hi!
I have some trouble with 2 of my gateways (from DSL) in the lobby.

1/ The gateway ipv4 disappear from lobby/dashboard/gateways when my modem is down.
I would expect to have still display as offline or something...how can I improve this ?

2/ The gateway ipv6 is stuck offline even when it's back only.
At the same time, dpinger service for this gateways seems off (red square instead of green triangle) in lobby / dashboard /service.
When I switch on again dpinger, the gateways turns green and online.
How can I make dpinger for this gateways to stay "on" ?

ideas welcome