In current implementation, we didn’t specify anything about reminders at the moment when syncing to Google Calendar.
Looking at Google Calendar’s API, I found an option that explicitly asks Google Calendar to use the default settings for reminders. I tried using it and it didn’t work
So at this point, I believe it’s a bug in Google Calendar’s API. That’s not something we can change, especially knowing that Google has notoriously bad customer support (or rather, no support at all).
The only workaround I can think of is overriding the reminder directly, but that would involve having an interface in Dynalist to configure the reminder override, saving it to your account, and using that when syncing with Google Calendar. It’s a fair amount of work, so I don’t believe that’s something we’ll be able to do right now given our priorities.