ArcGIS Pro license types—ArcGIS Pro | ArcGIS Desktop
ArcGIS Pro license types
Three license types are available with ArcGIS Pro: Named User, Concurrent Use, and Single Use. Named User licenses are the default type and are used in most cases.
With a Named User license, an ArcGIS Online or Portal for ArcGIS member can sign in to ArcGIS Pro and use the application on any machine on which it is installed. The application runs with the license level and extensions specified by the ArcGIS Online or Portal for ArcGIS administrator. A member with a Named User license can run ArcGIS Pro on up to three machines simultaneously.
With a Named User license, you are entitled to run ArcGIS Pro on "up to three machines simultaneously," unless the license has been checked out for offline use and then it is one machine.
I would contact Esri Support because the patch should not have changed the licensing of the software, at least as far as I have seen.