Is anyone facing ping issues only in FC Mobile H2H?

For almost a month, my ping keeps jumping from normal values to 300–999 ms during H2H matches, making gameplay unplayable. I tested different phones, WiFi, mobile data, 4G/5G, and network settings.

The strange thing is that BGMI and COD Mobile work fine now. Only FC Mobile H2H is affected

Is this a server/routing issue, or is anyone else experiencing the same problem?