From our testing it seams that debugging was left in build 69.

18:44:52 [INFO] Setting previous location (msu957): Location{world=CraftWorld{name=build}x=44.629961606215275y=74.53584062504456z=28.71789715191837pitch=-4.3778877yaw=4.4887323}
18:44:57 [INFO] Setting previous location (msu957): Location{world=CraftWorld{name=build}x=45.756438874740354y=14.0z=28.688520614097254pitch=7.246703yaw=-90.809906}
18:45:21 [INFO] Setting previous location (msu957): Location{world=CraftWorld{name=build}x=48.39415821695631y=10.0z=23.96316737875528pitch=1.2617838yaw=341.94705}
18:45:27 [INFO] Setting previous location (msu957): Location{world=CraftWorld{name=build}x=47.81760251827885y=14.0z=26.26441405471273pitch=2.9882073yaw=22.690643}
18:47:07 [INFO] Setting previous location (msu957): Location{world=CraftWorld{name=build}x=48.15764249268906y=44.0z=22.50667206628262pitch=-15.081691yaw=-12.183118}

I think this is intentional as @lithium3141 is trying to catch some of these null bugs. I'm closing this one for now.

@fernferret is correct - this is to help track down some issues with both #22 and the (now-closed, but still ever-so-slightly iffy) #23.