Bad news... After you'd said it's flickering I checked Saving Private Ryan again with longer samples and sadly it really flickers on C8 and M9702 too.
Final conclusion: STDL MEL (and DTDL MEL) flickers but STDL FEL doesn't.
Strange thing is that Transformers 4 (which has about the same bitrate for its FEL) works perfectly after the MEL conversion, no flickering at all.
I'm gonna test a few more titles.