Nope, I had to delete/recreate my Yahoo inbox which fixed it for a while. However I'm now experiencing issues where occasionally I receive no email for a day or so, even though I'm refreshing my inbox and I have a good internet connection over either WIFI or 4G. Using the Yahoo App confirms there is email coming in. Seems to fix itself though.
Also, the gaps in emails in my inbox continues from time to time. Last week when I opened my inbox I started to see the emails load up on the inbox list, one by one (took a couple of secs for each to appear).
If anything I'd say that things are getting worse, with a wider range of problems occurring which the organise by thread soon doesn't fix.