SuperCell games disconnections with 24.7

[mduck]

I am no expert in Opnsense, but after upgrading my system from version 23 to 24, I have a strange problem.

Supercell games are disconnecting,   even when you are in de lobby you wil get an disconnection error.  This happens to super cell games on any device.  (games tested Clash and Brawl stars).  If I read some info about this error, you probably have some wifi instability problems.   I  have 3 TP-link Deco M9 plus on AP mode.  and I have tested this setup with my ISP Router.  And then the problem is gone with the ISP router.

Installed Opnsense on another system and at first it seems to work for 1 day.  But the next day the problem reoccurred.  Still have to test this with an older version of Opnsense to confirm that is is version 24.7 that cause the problem.

all other games are working on my pc (COD MW3 and fortnite) are working fine also my sone isn't reporting any issues with gaming. (and he play a lot more games then me)  No errors in streaming services like netflix. 

using a fiber connection 1Gb/1Gb   with PPPoe
1 vlan for the internet and no other special settings. (minimal configuration that needed to work with internet and DHCP service running)

did some research wat can cause the problem and find out that default firewall rules are blocking some internal address. This happens around every 1 to 5 min.  that seems to be the device where I am playing on. 

looks to me that this could be the same problem:
https://forum.opnsense.org/index.php?topic=42657.0