Quick observation, sorry if you went over this already. It looks like you have the guiding deviation selected on the capture module. What do you have it set too? It seems like every time you go to dither the threshold you have set for guiding deviation is exceeded. This in turn will deactivate guiding and I believe also dithering since it is in the same module.

Go into your capture module, what is the guiding deviation set at?(Its on the bottom right and has a checkbox)

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