Alan,
Did you mention what capture software you are using? Please see attached screenshot for the dither settings for SGPro. Here you can change the size of the dither, the number of frames before a dither, and the settling time before imaging resumes. Have you tried manipulating these variables? More dithers result in higher errors, especially if you use after each frame, and your frames are short. It is pretty common for a dither to increase your guiding error for a short period of time, but it should smooth out over time. Have you checked off Fast Recenter after Calibration or Dither in the PHD2 brain guiding settings??
Perhaps your issue is within the various settings, not a stiction effect.
John
