MSTP: Ports not transitioning to forwarding state between two regions

Hi everyone,

I have two MSTP switch areas, each configured with its own region name. These two areas need to be connected. Unfortunately, the ports between them are not transitioning into the forwarding state.

My configuration in DMZ zone is like (sfp-sfpplus24 <-> facility switches):

/interface list
add name=Uplinks

/interface list member
add interface=qsfpplus1-1 list=Uplinks
add interface=qsfpplus2-1 list=Uplinks

/interface bridge
add name=bridge1 priority=0x4000 protocol-mode=mstp region-name=dmz vlan-filtering=yes

/interface bridge mlag
set bridge=bridge1 peer-port=qsfpplus1-1 priority=64

/interface bridge port
add bridge=bridge1 interface=sfp-sfpplus24 restricted-role=yes
add auto-isolate=yes bridge=bridge1 edge=no interface=Uplinks

/interface bridge vlan
add bridge=bridge1 tagged=Uplinks,sfp-sfpplus24 vlan-ids=1180

Config of facility is like (sfp-sfpplus24 <-> dmz switches):

/interface bridge
add name=bridge1 priority=0x4000 protocol-mode=mstp region-name=fac vlan-filtering=yes

/interface bridge port
add bridge=bridge1 interface=sfp-sfpplus24 restricted-role=yes
add auto-isolate=yes bridge=bridge1 edge=no interface=Uplink
add bridge=bridge1 interface=Downlink restricted-role=yes

/interface bridge vlan
add bridge=bridge1 tagged=bridge1,Uplink,sfp-sfpplus24,Downlink vlan-ids=1180

I am facing the issue, that the switches on dmz site are going into alternate port state.
On facility site the ports go to designated port.

As I understand (Spanning Tree Protocol - RouterOS - MikroTik Documentation) the connection between different regions should not be a problem?

Does anyone has a solution for this?
Thanks!

My topolgy is like: