Framerate issues with Mario Kart Double Dash

[KerlyQ]

Operating System: Windows 10 x64
Processor/CPU: Intel Core i7-8565U @ 1.80 GHz 1.99 GHz
Video Card/GPU: AMD Radeon R7 M440
Memory/RAM: 16 GB
Dolphin Revision Currently Using: 5.0

Hi, I've been playing MKDD on Dolphin now for at least 6 months, and just recently it started giving me trouble.  When I do 2 player Grand Prix mode, the frame rate immediately drops significantly, and it gets choppy enough that it's unplayable.  Every other game mode plays smoothly at 60fps - 1 player Grand Prix, 2 player Vs mode, battle mode.  Any ideas what would cause it?  I noticed something similar recently while playing Smash Bros Melee as well, specifically when trying to play doubles.

[Billiard26]

Consider trying a recent build of Dolphin. Dolphin 5.0 is over 4 years old.

[KerlyQ]

(11-26-2020, 11:40 AM)Billiard26 Wrote: Consider trying a recent build of Dolphin. Dolphin 5.0 is over 4 years old.

Gave the latest build a try, the issue is still there unfortunately.