DRV8874: Current output is chopping (unexpected)

Tool/software:

Dear Support Team,

I have configured DVR8874 to be in over-current only fault mode: 

But in the application I see charging of a external elko to look like this:

I would expect to not have "current chopping" by my selection of IPROP. 

May it be a problem, that nSLEEP is not driven by some logic, but on 3V3 power-up? Or in other words, can the problem be that the IPROP latching does not work the way I designed it? 

Regards,

Simon