App & website reporting controller offline, 1 or 2 refresh and it's usually back to online

My Vera Edge is controller is regularly reported as offline, both under and in the android app.
1 or 2 refresh (or app restart) and it is reporting online again.
Controlling devices in such circumstances is a real pain…

Both nightly heal and wakeup nnu have been disabled (in case this mighht be related).

Anybody else facing similar issues?