Emails incorrectly auto grouped by iPhone

Is there a way to ungroup just the email messages that my iphone auto grouped incorrectly because sometimes it groups emails that don't go together? And when this incorrect grouping happens, it’s only on my phone. If I open my mail on my computer they are grouped correctly. Seems like there should be a way to only group emails when they are from the same email address? Especially when it groups emails from two different people/email addresses who are completely unrelated and have never been copied on the same email.