Graphics - Frame rate tanks after upgrading car (pc gamepass)

Troubleshooting Hub Motorsport Troubleshooting FM Closed Issues
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Consistent problem I have is the game will always slow to a crawl after applying performance upgrades to any car and then returning to the main menu. It also happens fairly often after a series is completed and I return to the main menu. Only thing that will fix it is a complete game restart. Before this happens I will be at 100+fps in the menus and 75-85 in game. After it happens I’ll be at 30-40 fps in the menus and 20-30 fps in races.

EDIT: This will happen regardless of what the graphics settings are set to. The above performance numbers are referencing everything being set to high with RT off at 2560x1440 100% render scale and DLAA set to on.

System specs are as follows
CPU: AMD Ryzen 5 3600
GPU: Nvidia RTX 3070 (evga XC3 variant)
RAM: 32gb gskill Trident Z Neo DDR4 (2x 16gb DIMMs @3600mhz)
OS: Win10 home ver 10.0.19045
GPU Driver: 537.50

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Thank you all for your input. We have been working diligently to improve the performance of the game with each Update. To make sure we have the most up-to-date information on performance and crash issues you all are experiencing, we will be closing out this old thread and encourage you to open new ones so we can better triage and monitor. Thank you.