Comcast.net email-->Gmail -- I can send from gmail using comcast as "from" account, but do not receive incoming email

I have long used gmail for for my comcast.net email accounts with no problems.  Currently, I can use gmail successfully send and receive with all of my comcast.net accounts except for one. With that one account, I can send successfully using it as the "from" account via gmail but I am no longer receiving any messages. Gmail reports no errors but all the received emails for this one account remain in the comcast.net mailbox and never make it to the gmail mailbox.

Using the xfinity web email site I have confirmed I can see the messages, old and new, sent to this account sitting in the comcast mailbox.

I have replicated this connecting from gmail to smtp.comcast.net with both port 465 using SSL and also port 587 using TLS.  Same results: sending works, but not receiving.

Note: apparently my password had expired a few months ago so I had to change it today.  The new password appears to work fine in the xfinity web email site, in setting up & connecting to the comcast.net account in gmail, and in sending messages from the comcast.net account via gmail.