We have multiple HR sources (seven in total) and all sources have their own thresholds. If a threshold of one of the sources is exceeded all of the source imports get blocked.
This was an unexpected result for us and because of this unnecessary incidents occured concerning uncreated accounts.
We believe that only the the actions from the source where the threshold has been exceeded should be blocked. The import of all the other sources should be processed as usual.
We reported this as a bug but we were told that it works a designed. We think it's a design flaw and we hope this will be corrected in the near future.