Bug with sync in course libraries page

[ChrisChV]

See #1977 (comment)

It has been observed that this issue only occurs in the sandbox (production instance). Will it be a race condition in some celery task? (PD: It's missing to test locally activating the Celery)

[bradenmacdonald]

If it's only happening on the sandbox, I think that's most likely the problem.

[ChrisChV]

Yes, but it can be on production instances. I haven't had time to test it on my local by activating Celery.