Homepage widget "stuck" in cache

Thank you for a great, great plugin!

All works fine except the homepage widget event list stays the same while other pages are already to the next week of events. I have flushed all cache (use supercasher from Siteground) en ctrl f5 (which a visitor off course should not need to do).

Any idea what it could be and/or what I could do…

https://www.ads-software.com/plugins/event-list/