Recieving emails are delayed
I can see new emails come in on my phone email app, but those same emails do not appear in my browser email on my PC.
I've signed out of email, cleared/cookies history, signed back in and no change. The emails eventually show up on the desktop browser, but it takes hours or days.

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MICHAEL LEWIS commented
Unfortunately, I do not have screen shots of the event and all of the emails now appear in the inbox. I just sent a test email from my work email address to my personal email (yahoo address) and it showed up on my PC web browser email a second after it showed up in my iPhone email app.
I then forwarded the test email from my personal yahoo account to a yahoo account my wife and I share together. The email showed up in that inbox at the same time--whatever issue was delaying delivery to the web browser email seems to no longer be an issue.
When the issue was still going yesterday, I tried 3 different browsers and cleared history/cookies to see if that could force the program to request new emails from the server, however it did not work.
Additionally, I just looked at the test emails I had sent yesterday that were delayed. The phone and the web browser version both have the same sent time stamp--I don't see anything that indicates the received time, but they were several hours apart.