In November, 9to5Mac brought you an exclusive interview on Twitter’s limitations on third-party developers with the Iconfactory’s Gedeon Maheux. In the original article, Maheux said that development on Twitterrific 5 for Mac had stalled due to Twitter’s strict limits on how many users can login to a particular application.

While Twitterrific 5 is the first application to have been stuck in development because of these limits, another popular client seems to have claimed the title of the first Twitter app for Mac to run into the token ceiling: Tweetbot.

For a full explanation on Twitter’s token limits and how they affect third-party app development and the Mac ecosystem, see this report.

Tweetbot for Mac disappeared from the Mac App Store early this morning as users began reporting that the app was no longer allowing new logins.

While it’s possible that this could be a glitch in Twitter’s system, 9to5Mac was previously told that the app was on track to potentially reach the limit around the end of 2014, and the app would likely have to be removed from sale at that time. While that didn’t end up being the case, we are only a month into the new year, so this could still be the case.

The disappearance of the application from the store indicates that this may not be a mere glitch on Twitter’s end.

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We reached out to Tapbots developer Paul Haddad to find out how this turn of events could impact the future of Tweetbot for Mac. As many users running OS X Yosemite have undoubtedly noticed, Tweetbot currently suffers from a few bugs on the latest Mac operating system, and its design isn’t geared toward the new aesthetic.

We will update this report when we have a response.

For what it’s worth, Tapbots Mac developer Todd Thomas has doubts about hitting the limit:

Haddad, on the other hand, posted this vague tweet just two hours after the first reports of error messages:

Update: Although Tweetbot has not returned to the Mac App Store, the app has resumed accepting some new accounts since publication of our report, and Tapbots appears to be working on resolving whatever the issue may be. However, other attempts to login to a new account are resulting in a different error than before, as seen below.

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What exactly that means for new users is unclear. It could be that a behind-the-scenes issue with Twitter is in the process of being resolved, additional tokens have been granted, or some users have logged into Twitter and deactivated their tokens, which then became available to new users.

Update 2: Less than two hours after the appearance of the above message, the original token limit error has resurfaced. The app seems to be switching back and forth between accepting a few logins and returning an error message.

Update 3: Tweetbot for Mac has reappeared on the App Store and is accepting new logins now. Twitter did not respond to multiple requests for comment on whether this was a legitimate token issue or the first instance of a false positive on this type of error.