W/System.err: LogglyTree failed: null

[mateusgrb]

Some logs are regularly failing to be sent to Loggly, printing this message to Logcat:

W/System.err: LogglyTree failed: null

Although it's not always the case, this often happens when the log method is called a few times in a short period. For example, a call at 10:28:29.133, then another call at 10:28:29.193, then another call at 10:28:29.201. All 3 have failed.

Any ideas?