Man, why did the Sage (or whoever, or whatever) set it up so inconveniently? The inability of summons to reverse-summon you even with your consent, or in any way communicate with you in the Human Realm, creates so many logistical hurdles.
I guess it's a point in favour of the Seventh Path being some sort of prison/exclusion zone.
Unfortunately no, the best solution anyone has to this sort of problem is just checking in regularly, like once or twice a day, and hope that anything they need help with isn't that urgent.
Hazou's to do list just got another item: finding a way to let summons contact their summoners while the summoners are on the human path. Once we solve that problem we have to make sure it only goes to summons we trust to be sufficiently mature about how to use it.
As adorable as it would be at first getting puppy prank called would get old fast:
Canfucius: ((Summoner I am so sorry.))
Hazou: ((Why? This new technique works great!))
Canfucius: ((Yes, it's very simple and easy to learn... so incredibly simple...))
Hazou: ((It's by design so that anyone and everyone can talk to me even if I'm asleep. No one gets left out!))
Canfucius: ((As a teacher, that warms my heart. As a father... do you have any children of your own?))
Hazou: ((No, why?))
Canfucius: ((Well, consider this a lesson and a taste of fatherhood.))
Hazou: ((What do you mea-))
Puppy 1: ((HELLO SUMMONER! I JUST LEARNED THE BESTEST NEW TECHNIQUE AND ALSO I LOVE YOU!))
Puppy 2: ((I AM AWAKE THEREFORE I AM EXCITED!))
Puppy 3: ((I HAVE SO MANY QUESTIONS! HAVE YOU EVER MANAGED TO CATCH YOUR OWN TAIL??? I HAVE!))
VIHH: "It's getting a bit crowded in here, but in a strangely adorable way."