Hello
Since the issue started after the upgrade to SAPGUI 730, I suggest you to update your SAP GUI patch. You are running patch level 5 and patch level 11 is already available for 730.
I wrote the following document for the frequent screen issues on CRP transactions and here you can find instructions to dowload and install SAP GUI patches:
CM21 / CM25: General screen problems
You can download SAP GUI patch 11 on the link below:
Regards
Caetano