Only one port visible in MCLAG topoloy

Hello everyone, 

I was creating MCLAG peer group with 2x FGT120G (which are in active passive HA) and 2x FSW424E. I was doing this for two different clusters. In first one everything seems to be in order but on the other one port is missing when I check the topology in Switch Controller menu on FGT. The config is identical for both.

I have fortilink interface with x1 and x2 as members.

FGT1 - x1 -> port25 on SW1 and x2 -> port25 on SW2
FGT2 - x1 -> port26 on SW2 and x2 -> port26 on SW1

As I was creating the stack i only connected ports from FGT1 which was active to switches (first SW1 then SW2), after authorization I followed the guide and made the mclag peer group between the switches with ports23 and 24. After this was established I connected ports from the passive member (x1 to port26 on SW2 and x2 to port26 on SW1) but it did not appear in the topology? Is there way I can force some sort of LACP renegotiation or something? Restart of the switches did not work. Any help is appreciated.

PS: even building the stack was crazy process as for some reason when I connected the switches to the HA pair for the first time for some reason one switch always had No ports connected, so I had to basically connected 1 switch with 1 port wait few minutes for authorization and establishment, connect second to the same, then configure MCLAG for it to even get into the state I am in right now. The first cluster was flawless immediately saw all ports as they should be.