Hello 5stonely, and welcome to the forum.
Aerolineas Argentinas announced yesterday they cancelled all their flights to Bariloche until March. Although one might expect Lan to follow suit, they haven't yet announced what they will do.
The other options you should consider for going to Bariloche in February would be flying either to Neuquén or Esquel + bus ride to Bariloche, or (very long) bus ride from Calafate.
There has been no official information as for the reasons of postponement of the reopening.
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