Sonos +32 units more systems on same network Ikea Symfonisk remote

Hi.

Have a big Sonos system. Exceed 32 units.

Divided into more Sonos systems on same network. 

No problems - all using Netgear Orbi Mesh WiFi.

Have Ikea Dirigera (newest) and Ikea remotes on my “primary system”.

The Ikea switches (over time) from primary to secondary or third Sonos system leaving remotes non functional.

When I power off and reconnect power to Dirigera - it again finds my primary system until next time it switches.

In the Ikea Smart Home app - I cannot select a system. Look like Ikea scans my network for units and selects.

Sorry 

Anyway to solve the issue - Ikea Smart home not to change system. Lock it to “primary” Sonos system.
Even a system on another Sonos account does not solve my issue. 

Or how to have more than 32 units on my network as one system.