No.
Primary: 1920x1080@144
Secondary: 2560x1440@60
Edit: Out of curiosity I set both to 1920x1080@60 and that did not change anything.
This is likely related to the DirectX 11 changeover. Please try reverting to DX9 and let me know if you're still having this issue. Steps below.
To opt out of DirectX 11, and revert to DirectX 9:
- Open Steam
- Right-click Rocket League, select Properties
- Choose Select Launch Options under the General tab
- Paste in -dx9, select OK
- Start Rocket League