I created a pin, it showed up on my board, received impressions and clicks, then after a few days just vanished.
Support ticket open. No response.
https://www.pinterest.com/pin/569142471670018641
I have sent in a support ticket every week for the last month and Pinterest has yet to respond. I did see a moderator mention the issue has been fixed last week. I tried to open a ticket and received an automated message. Still no response after over a week. Good luck getting your issue resolved.
Although you may be aware of this, in all cases, Pinterest replies with an automated message and you need to respond again to that message or your ticket is closed.