I can get this tonight, but there is nothing special about it. Turn on the AWG, select triangle, I think it was 800mV amplitude. The issue was viewed on an analog scope and also a 2207B. Can you try to repeat this test with a 2205A to see if you can reproduce it?
I am not seeing the same effect here using the current release 6.12.9, so the psdata file would be useful, just to make sure that we are set up in an identical manner.
Also, it doesn't see the glitch itself easily, so connect the output of the 2205A to a higher bandwidth/different clock domain scope to see if you can reproduce it.
With your settings I am seeing the glitch, it is related to the signal generator voltage level, and becomes more visible the lower the level gets. I will raise this as an issue with the development team.