That was funny

But in all seriousness with a google search of the transactions I extracted from the address you posted in the screenshot above I found this: https://gist.github.com/jgilmour/6215961 that contains a list of similarly broken R values generated from a broken random number generator on Android. As you can see it is not "5 characters", it is reused k value generating the same R.

I believe it is related to this warning from 2013
https://bitcoin.org/en/alert/2013-08-11-android