Hue and Smartthings hub on/off problem

Smartthings new app (also classic) shows hue bulbs and hub constantly changing state from On to Off. Cycle about change per 2 second. (all on or off sametime)

  1. bulps not change state i.e no light on/off
  2. During that time ST app cant control bulbs.
  3. Hue app has full control for bulbs and all accessories. i.e hue app has control
  4. Switching ST hub (power off) off and on returns all working.
  5. Isseue comes back after days…
  6. Hubs are located 2m from eachothers without walls between, for same network.

How to fix? (I hav asked various times from st support but they are useless)