Thank you for the feedback. The autopilot disconnecting in turbulence isn't something we can replicate on our side, but we also don't have FSRealistic or Realturb installed. If you are able to find any correlation between those that would be useful information for us, as there are a few other forum users experiencing somewhat related behaviour.
Something that we have recommended to a few users is to reduce the Turbulence setting in Settings > Assistances > Turbulence. By default, this is set to "Realistic" which can cause the turbulence to feel quite aggressive, so we recommend trying "Low" or "Medium" and then seeing how you get on with that.
Mark - Just Flight