Howdy Ed,
Welcome to our support forums and thanks for reaching out to us! Sorry to hear about this issue, hopefully we’ll get this right soon 🙂
Can you please go to WP-Admin > Events > Help > Event Aggregator System Status and check the values for Current usage, Server Connection and Scheduler Status? If you find it easier just send a screenshot of that section!
Hopefully this information will allow us to see if it’s an issue with WP Cron, the server connection or the imports limit!
Please let me know about it,
Best,
Nico