Iphone11 - ios14.2 Wifi Disconnects when I use bluetooth during video calls

I am on my wifi connection.
I am connected to Samsung Galaxy Buds+ via bluetooth.
I try to place a videocall on any platform ( Whatsapp, Instagram, Facetime ) vide call connects and then I see poor connection and my wifi disconnects automatically and uses Mobile Data.

Now, if I connect wired earpods and connect using same wifi and same platform the calling experience is seamless & glitch free.

Have tried resetting network settings and all settings too, but no luck!

Any leads may help!Thanks!
Iphone11 - ios14.2 Wifi Disconnects when I use bluetooth during video calls
 
 
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