PC] Rivals disconnects after 3 min since patch – FUT Champs fine

Since the latest patch, I keep getting disconnected from every Rivals match after around 2:30–3:30 minutes. The match ends instantly and I am thrown back to the menu without receiving a loss.

Interestingly, I was able to play FUT Champs (around 10–15 matches) without any issues. FUT Champs runs perfectly stable, only Rivals disconnects consistently after a few minutes.

Already tested with no change:

Game repair
Crossplay off/on
IPv6 disabled
EA Anti-Cheat reinstalled
Firewall/antivirus exceptions added
Stable LAN connection (other online games work fine)

Conclusion:
This is very likely a Rivals-specific server/session issue on PC introduced with the recent update.

Request:
Please investigate the Rivals matchmaking/session stability on PC. FUT Champs is unaffected, so this seems isolated to Rivals (possibly Rush/Draft too).