"get_stations" in obspy, fails when "endafter" is used

[iceseismic]

Inside obspy:
(a) client.get_stations(latitude=-38.2, longitude=176.2, maxradius=0.2, level="channel") works fine, but
the same line also using endafter=2016-01-01T00:00:00 fails with the following screen message :

[nbalfour]

"endtime" works but "endbefore" and "endafter" doesn't.
Tested using obspy fdsn python 3. Will follow up next week.