I've had this issue since season 16 and stopped playing because of it, checking back in for one game each day to see if it was fixed.
I started fiddling with settings and am back playing without FPS issue (3 games so far)
In Xbox settings > general tv options - I've changed:
4k resolution > 1440p
60Hz refresh rate > 120 Hz
One or both of those settings seems to have greatly improved if not completely resolved it to pre season 16 FPS. Not sure what similar settings are for PS.
Keen to know if this helps anyone else...
No, 1080p and 60 or 40 no help.
Thanks though
