I’m not aware that the double-paste problem has been fixed; as far as I know, it is still a problem as I have continued to receive reports. In fact, I intend to add JetBrains apps to PopClip’s excluded apps list by default in the next version. Do you have any info about the fix?
Thanks for the report about the other problem. However until I’m sure the double paste bug is solved I won’t go any further on it.