Did you try to reinstall FeynCalc (stable version) using the automatic installer to make sure that you have the latest bugfixes?
Yes
Please provide a minimal working example that illustrates the problem. Please explain the difference between the current behavior and the expected behavior.
11.3.0 for Linux x86 (64-bit) (March 7, 2018)
9.2.0
Yes
When I ran the codes above, Mathematica returned an error to me
And when I ran without
FAPatch[PatchModelsOnly -> True]
, that isNo error returned. Maybe, there is a bug in
FAPatch[PatchModelsOnly -> True]
Best wishes!