Presence ....... again!

I am using life 360 as my presence on my Android phone to arm and disarm SHM modes when i arrive or depart and it’s very good with location accuracy. .
When i depart SHM arms without fail when i leave my circle so all is good .
However when i arrive back there is :

  1. A long delay to disarm SHM even though in “my home” on the app “present” is almost instantaneously shown .
  2. It just doesn’t disarm and i have to manually disarm in the app although i am "present " in the app, it’s as though ST can’t be arsed sending the message to SHM .
    Any ideas as to what it can be???