[Ole]

... It was 1 hour with one inversion every 5 minutes.

...

I'm not sure, but my guess would be that stand development may only work with the old thick emulsions.

Did you mean "1 five minute agitation, and stand for an hour"? Stand development works just fine with modern emulsions, but it needs to stand.

I haven't tried Rodinal for stand developing though, and it wouldn't be my first choise either. If I have no idea what conditions a film was exposed under, and whether the exposure was under, on, or over, or in some cases where I don't even know what film it is (!), I give 90 minutes stand in half-strength FX-2.