I'm participating in the Tournament in SwSh in Wyndon (?) And whenever I switch in my shiny Inteleon, the shiny sparkles take a solid 5 seconds before playing, almost like that annoying lag in online battles. Except, I'm not connected to wifi. And this hasn't happened with my shiny Ninetales. Only Inteleon.
Physical copy, and on the second gen Nintendo Switch I believe. None of the Pokemon in my party are hacked-- all were legitly obtained. My switch is not hacked, so there isn't any hacked coding, items, or software in the save. I did record a video, but my youtube app has been taking its time, so I might experiment with this more and upload a few clips later. From what I gathered so far:
-If a shiny is in the first slot of my party and sent out when a battle begins, there's no lag.
-When I switch my Pokemon, the sparkles take their sweet time thinking about shining or not
-This was in Gym Battles in the stadium.
-This doesn't happen for wild encounters (i havent tried trainers yet)
-This happens every time.