Thank you for posting on PSC. I took a look into the documents available on the Pega Suvey landing page on PDN: Pega Survey
I wasn't able to find a list of hotfixes. What I do know is that for most hotfixes, there exists a related Support Article. So, I filtered the Support Articles available on PDN for Pega Suvey here (Support tab above > Support Articles > apply filter for Pega Survey available on the left pane)
How about you create one listing all the issues and the engineer handling that SR could advise you if you need to create more than one? Please let us know the SR number once created so that I could tag that to this post and track it!