On September 7, Bitcoin Core developer Wladimir van der Laan tweeted that he may be "done with coins" all together. He later confirmed to Cointelegraph that he was indeed taking a break from his duties as a Core developer and one of the custodians of the project’s Github repository. One of the factors that led him to this decision was a Twitter storm that lasted for days and was caused by the renaming of a variable that specifies a list of characters that cannot appear in filenames due to operating system restrictions.
Source: Bitcoin Github repository.