Mesh Network with multiple Portals

Hi, I have a mesh network using HWMP + and working fine in hotspot
Another part of the network is not configured as a mesh but the same hotspot.
One AP is like Portal and three AP as not Portal.
All APs on 2.4GHz

But if I put another AP as Portal, the mesh network lock.

And even if configuring other network in 5.8GHz mesh with another SSID will also lock
Why does it happen?