RIP on RoS 7.21.5 does not work as expected

Hi all,

I know RIP does not widely used but still exist on RoS 7.x

I try RIP using 3 routers on lab environment with bus topologi (RoS 7.21.5)

R1 ----- R2 ----- R3

R1
/ip address
add address=192.168.1.1 interface=lo network=192.168.1.1
add address=10.1.1.1/30 interface=ether3 network=10.1.1.0
/routing rip instance
add afi=ip disabled=no name=rip-instance-1 redistribute=connected
/routing rip interface-template
add cost=5 disabled=no instance=rip-instance-1 interfaces=ether3
/system identity set name=R1

R2
/ip address
add address=192.168.2.1 interface=lo network=192.168.2.1
add address=10.1.1.2/30 interface=ether4 network=10.1.1.0
add address=10.1.2.1/30 interface=ether3 network=10.1.2.0
/routing rip instance
add afi=ip disabled=no name=rip-instance-1 redistribute=connected
/routing rip interface-template
add cost=5 disabled=no instance=rip-instance-1 interfaces=ether3,ether4
/system identity set name=R2

R3
/ip address
add address=192.168.3.1 interface=lo network=192.168.3.1
add address=10.1.2.2/30 interface=ether4 network=10.1.2.0
/routing rip instance
add afi=ip disabled=no name=rip-instance-1 redistribute=connected
/routing rip interface-template
add cost=5 disabled=no instance=rip-instance-1 interfaces=ether4
/system identity set name=R3

The result are:
* Router R1 and R2 know each other
* Router R2 and R3 know each other
* but R1 and R3 does now know each other

What could be wrong ?

Note: I try similar lab on RoS 6.49.20 and it works nicely; R1 and R3 well know each other.

P