There is definitely a problem with that resonance tuning as FFB feels more grainy and jolty with 2021.1,
Tried increasing Recon which helped with graininess a bit but not much with spikes.
So month later after fighting with this decided to downgrade to 2020.10 to see if this is indeed FW issue and not something else.
With 2020.10 the FFB is again smooth and rubbery like I remember and what I liked, and no more jolts or spikes. Seems like there are more users noticing the same.
Hope you’ll get a chance to look at it as 2021.1 feels like wheelbase downgrade.
Titles used for testing of both FW same settings, same conditions are AC and ACC.