STOP THE "IMPROVEMENTS"!
The most recent "improvement" has an attempt to read a message cause an immediate switch to a listing of the message history but without the current message. The only way I can read the current message is to move it to an archived file and read it there. I'm tired of wasting time finding ways around botched changes.
Yahoo should either stop messing around with the mail system or employ competent IT people. Also, it would be more responsible to test the changes before imposing them on the users. "Debugging-by-users" may save Yahoo the cost of testing but it's a terrible business model. It destroys user confidence and further diminishes what little is left of Yahoo's reputation.
Other's multiple complaints make it clear that Yahoo does not read them, thus confirming that Yahoo does NOT care about its users.
If you still find that the issue is happening, please see this help page for troubleshooting:
https://help.yahoo.com/kb/new-mail/fix-problems-mail-sln28075.html?impressions=true
If it persists, reach out to us through our Help pages or Forums:
https://help.yahoo.com
https://forums.yahoo.net
Thank you!
Mail Support