I would consider creating a MyCase and get in contact with a cypress ingeneer.
to do so, on top of this page click on "Design Support -> Create a Support Case -> Technical Support".
I will try that.
I have the same problem with Keil v4.73 and SEGGER J-Link debugger. Do you resolve this issue at this moment?
Yes it is solved. The PSoC Creator export to IDE use wrong programming algorithm in Keil "Flash Download" tab.
CY8C5xxLP.FLM should be used. Put the file in "C:\Keil\ARM\flash" folder,
You will find it in
c:\Program Files (x86)\Cypress\Programmer\3rd_Party_Configuration_Files\CY8C5xxLP\Prog_Algorithm\
This is tested with Keil ver 4.74, and ver 5