Has anyone else gone back to C&P 6 months into a claim, after Preparation for Decision?

I have an extensive claim with 19 conditions...most are secondary or increases to existing conditions. I submitted the claim in September 2018 and attached all applicable medical records to my claim. At first, the ETC was February 2019. When February came, the ETC changed to March. Around 1 March, it was at “Preparation for Decision” and switched back to “Gathering of Evidence”. I started getting calls for additional C&P appointments. I’m getting ready to go to my second one. Not rushing my claim at all but just wondering if anyone else went back to more C&P appointments after PFD.