Same issue has been reproduced. I've even reset the profile to double check, but the problem still exists. In beta version counter was working fine.
Kill counter for the rest of the monsters works correctly
P.S. Crash Dump file was not uploaded, because it was too big
When accesing library to check kill count of Blobs, I miss information of the first one.
Name, graphic and kill count is not displayed regardless of how many times I killed them.