Emails display in Gmail from wrong sender on iPhone only
This is a weird one. iPhone 6 running 8.0.2. I've had every iPhone since 2007 and have never seen this before. My 6 has been rock solid since I picked it up on launch day.
I shipped a package via USPS, and signed up for tracking updates via email to my main Gmail account, which I've done 100 times. Yesterday morning I received one of the tracking emails...the sender displays as US_Postal_Service@usps.com in my inbox with the subject line as "USPS Shipment Info for <tracking number>". All good and normal.
Here's the weird thing - the next 6 emails received directly after that one ALSO display as coming from US_Postal_Service@usps.com with that same subject line, even though they are really from various senders - Groupon, BestBuy, MLB, etc. When I tap one of those messages to read it, it still shows the USPS sender and subject, but actual the body of the email is correct and as it should be - Groupon, BestBuy, etc. Restarting the phone had no effect.
When I view that Gmail inbox on my iPad or on a full browser on my desktop computer, those emails display properly, and don't have the rogue USPS info associated with them. Nothing has changed with this Gmail account, and this phone was set up from my iPhone 5's last backup, which never had this issue. All emails received since yesterday morning are behaving normally.
Do I call this a weird glitch and just move on? Has anyone seen anything like this, or have any idea what might have caused it? Thanks!
iPhone 6, Windows Vista, iPad Mini, MacBook 13", Apple TV