After the new profile, denoted by p(old conn name) is created for zOS DB2 with properties: protocol=TCPIP;datetimestringformat=JIS;authentication=SERVER. It saves and is seen on the portal. If I look at list of all profiles in DataMaker before logging in, I can see new pDSG with all properties. Open DataMaker and connect to that new profile created within portal, part of the properties are truncated to only show: protocol=TCPIP from DataMaker. Open Portal for this same pDSG profile and it shows no connection properties from the Connection profile edit window.

TDM Portal 4.7

TDMWeb-4.7.71.0.zip fixes issue.  Please contact BC Support for this version or later of 4.7.  If you are installing a GA Version after March 11, 2019, please contact BC Support to verify that this fix made it into the GA Build.

Video URL on how to open a Support Case - https://communities.ca.com/videos/5898-demo-how-to-open-a-support-case
You can download the latest version of TDM by following the directions in this document: https://comm.support.ca.com/kb/How-to-Download-Test-Data-Manager/KB000009671.    
To contact support, go to https://www.ca.com/us/services-support/ca-support/contact-support.html.