Oscillation is expected in F1 - both it and GT7 use a very strong centre spring effect and if the torque on the wheel or in-game is set high then it will cause oscillations.
A loss of FFB on corners is something that a few people have reported with various wheels in F1 24. The obvious things I would check there are:
- Is it present in all modes (multiplayer, time trial, offline GP)?
- Always on the same corners?
- Are you using a custom car setup and, if so, is it one generated with an earlier patch? If so then try creating a new setup.
- Do you run with all assists off?
The obvious thought when someone says they're losing FFB in a corner is that they're going in too hot and locking up the front wheels, at which point the FFB will go light, so more context/explanation outside of the above questions would be great. Remember they made a lot of changes to the handling and physics in 24, so what applied to 23, doesn't necessarily apply to 24.