[Bug] Can't load into Diamond ranked lobbies when in a party - error code:tap

 Hey, been dealing with a weird issue for the past few days and can't figure it out. The situation: All my friends and I are Platinum When we queue ranked trios and get put into a Plat lobby, I load in fine When we get put into a Diamond lobby (skill based overflow), I get a black loading screen and get kicked back to lobby with error code:tap Only happens to me, my friends load in fine every time Solo queue ranked works perfectly Casual trios works perfectly Duo ranked works most of the time What I've already tried: Flushed DNS, reset network stack Port forwarding for Apex ports Disabled all router firewall filtering Enabled DMZ (fully bypasses router firewall) 0% packet loss, 50ms ping to eu-central-1 Windows Firewall checked, Apex is allowed through Nothing has fixed it. DMZ being on helps sometimes but diamond lobbies still kick me inconsistently. Has anyone else experienced this or know a fix? Feels like an account-side issue with how my connection gets authenticated for higher rank lobbies specifically. Platform: PC | Region: EU