Lens profile oddity. (Sigma 12-24 II DG HSM)

something's been driving me crazy last few days; lightroom automatically detecting , applying correct lens profile in circumstances not others.  it's odd behaviour seemed intermittent i've worked out pattern. has been working fine months, changed last week.

 

i'm shooting canon 6d , sigma 12-24 ii dg hsm lens, shooting raw only.

 

on import, have preset automatically selects "enable profile corrections". noticed last week many of photographs showing "unable fins matching profile automatically". i've worked out in camera settings (p, av, tv, m etc) profile not read, when i'm shooting in custom setting set ages ago (which based on av) setting *is* recognised. (i've tested other lenses, , profile fine, it's lens specific on settings.

 

that's oddity one.

 

oddity 2 makes more frustrating: photographs haven't picked profile automatically, correct profile not available in list select manually! lightroom has profile, it's there *some* photographs one, why can't find it?

 

here's list of lenses when profile *has* been found automatically (with correct 1 selected):

 

 

yet when hasn't, , select sigma, list of available profiles shorter:

 

... , includes older version of lens.

 

sorry long; assistance hugely appreciated making daily workflow longer , less able produce satisfactory result.

phew! heavens above i've worked out (though not sure triggered it). somehow i'd managed switch shooting jpg - genuinely can't see how did mistake, seem have done - c1 custom setting i'd set retained raw shooting, hence working on ones.

 

as were.

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