I would try going into the app settings and clearing both cache and data. This *should* erase everything on your phone and force a sync. I'm not 100% sure though, so be cautious.
I'm just thinking something got corrupted when you migrated over to the S10. It happens.
I should add that I never have issues using Google Calendar and my family uses it extensively. I change calendar apps all of the time out of boredom and have never experienced anything like this.
Last edited by psicodude; 08-01-2019 at 10:03 AM.
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