What might be reasons that @InjectMock does not installing a mock?

[HerrDerb]

in Quarkus 2.16.6, I have a QuarkusTest in which I use @InjectMock running the test in single, everything works, a mock is getting injected.
Running all test together, the regular bean is used thus calling the real methods leading to failure of the test.

Right now, I cannot reproduce it, except in my project (reason still unknown), which I am not able to share. I am in riddles.
I do use a @interceptor for my tests (BeforeEach, AfterEach and Test methods), but it does not keep a state,

What might be reasons, that when running test in a series a @InjectMock suddently fails/irgnores installing a mock?

[HerrDerb]

Nevermind, this is too open