Here is the alert Proseries released on this matter.  It was late November of 2018.  You must have transferred your clients prior.  I only transfer when they come in door so non of mine were transferred before Jan. 10th.  So no effect for me.  It was one of those yellow bar alerts that came across screen that you have to click to hide.  Plus there have been posts here about it since the beginning of 2019.  I always check here for problems before updating.

https://accountants-community.intuit.com/announcements/1781726