Interesting, thought I was the only one for a minute
Can confirm seeing similar but since 02.04.2018 (Which just so happens to be the day I saw the new Policy and Community Guidelines Prompt)
However this is only occurring on a few of my accounts, so looking into things further but likely has something to do with them enforcing an area under the "Spam & Quality" section of the Community Guidelines.
Also these accounts on the 1st to the 3rd of the month also had some weird anomaly which meant that group boards you had joined vanished on desktop, but were still present and you were able to pin just not see them in your active boards. They didn't seem affected on mobile however. Curious if you noticed the same?
Until it levels of I have stopped the automation on these problem accounts to better measure the metrics and find the route cause, but that's just my approach you can do different, I just want to get the data before planning anything and also see the pins still bringing traffic throughout the drop.
If I find anything useful I will share it here, but recommend reading between the lines in the guidelines and assessing how you approach pinning going forward.
