Sigma 24-105mm lens production “on hold”?

Those of you who preordered the new 24-105mm Sigma A-mount lens will certainly be unhappy to read this: SAR reader Keith got this note from Sigma US:

Good afternoon,

Unfortunately, production of the 24-105mm has been halted in all mounts.  It was originally supposed to be released for Sony this month, but now production is on an indefinite hold.  I will save your e-mail address and get back to you when we know more.

Please let me know if you have any questions.

Have a great day!