I have been using Good Task for almost 3 years now and I originally synced it up with my Reminders app to transfer over all my existing reminders. Since that day, I did not open up the Reminders app once. I accidentally opened it up yesterday and it appears to have really messed up my Good Task reminders. Unfortunately, it's now loaded in a bunch of overdue reminders from 2-3 years ago and doesn't seem to have saved most of my new reminders I had set natively in the Good Task app over the past year. It's odd, it's saved just a handful of some recurring reminders I had, but that's all. I had some one-off reminders I had set into my phone for business or personal, and it disappeared. I tried to cross-check with the Reminders app but they aren't there either. I would think that's likely because I put those newer one off reminders only in Good Task to begin with.
I'm unsure what to do at this point. What troubleshooting can I try to retrieve all of those lost reminders and why did opening up my old Reminders app totally throw everything off like that?