Mail deleted in gmail web still remains in iphone mail app for some reason
I deleted a bunch of emails in the gmail website on my computer. However, when I checked my iphone apple mail app, for some reason, some of the emails that I deleted from gmail still exist in my iphone mail app. I did clear out my trash in the gmail website and when I searched in the "all mail" folder in the gmail website for those deleted emails, those emails didn't show up, so I'm pretty sure those emails are indeed deleted and not just archived somewhere. Oddly enough, some of the emails I deleted in the gmail website have been correctly deleted in my iphone mail app, it's just that some other ones weren't correctly deleted for some reason. Also, I waited a day and those deleted emails still show up in the iphone mail app, so I don't think it's because of some syncing delay.
Does anyone know why this is happening and also know how to get the deleted mail to be deleted correctly in the iphone mail app too? I'm also concerned that maybe some of the mail didn't delete properly and that's why it's still in the iphone mail app?