Impossible to type 's' or 'p' in GitHub text zones

It seems that I am not the only one with this problem:<p>- <a href="https:&#x2F;&#x2F;twitter.com&#x2F;FriendlyTester&#x2F;status&#x2F;909766104666529792" rel="nofollow">https:&#x2F;&#x2F;twitter.com&#x2F;FriendlyTester&#x2F;status&#x2F;909766104666529792</a><p>- <a href="https:&#x2F;&#x2F;twitter.com&#x2F;_srph&#x2F;status&#x2F;909766541167562753" rel="nofollow">https:&#x2F;&#x2F;twitter.com&#x2F;_srph&#x2F;status&#x2F;909766541167562753</a>

A friend recommends using a long s (ſ) until the problem is resolved. Refer to your operating system documentation to find out how to type it.

Did you contact github? <a href="https:&#x2F;&#x2F;github.com&#x2F;contact" rel="nofollow">https:&#x2F;&#x2F;github.com&#x2F;contact</a>

No problem here.