Dismal performance after SU5

I am using the Aerosoft CRJ700 from the store in-game.
Are you using Developer Mode or made changes in it? no

Brief description of the issue: FPS pre SU5 was 35 in clear weather, 22 in bad weather. Now its 18 in clear and down to 6 or 7 in bad wx

Detail steps to reproduce the issue encountered:

PC specs for those who want to assist (if not entered in your profile)
i7-7700K
32G RAM
RTX2080 Super

Build Version # when you first started experiencing this issue:
SU5
Are you on the Steam or Microsoft Store version?
MSStore
Did you submit this to Zendesk? If so, what is your ticket #?

#112599