It used to, and it was quite dreadful.

Efke is now produced on a modern film base, and that atrocious curling
problem is a thing of the past.

Film was Kodak Tri-x 400

That was what I observed in working in photofinishing over the past 50
years; long before I got my MFA.  ;-]

Usually, when we ran into one of these "tubal" rolls, we we wound it
emulsion out, into a spool or canister shape, then secured the rolled
spool with a strong rubber band and left it until we remembered its
existence, a day or two later.  

This seemed to work best in the summer, when humidity was high, so one
of the guys and the boss started constructing a steamer-roller to
straighten out the tubal type curled films.  While waiting for the
parts to arrive for their project, they set a drying cabinet aside, in
which they put a very aggressive humidifier, a hospital discard.  That
worked so well, that they never got around to the invention.

The cabinet humidifier worked with other problem films and prints.
This latter was a lifesaver for this small lab when the industrial
strength Kodak print flattener broke down.  Using paper from almost
every manufacturer in the world can show you an awful variety of
problems.  We had papers from Ansco/GAF, Kodak and Du Pont to
Xerox/Haloid and Agfa to Tura, with stops at Mimosa and the big
Japanese triad.

Compared to back the, we have it easy today.

Robert Vervoordt, MFA