3rd party email client issues

Hi XfinityQue.  There are 5 people in my family.  All of us have our own comcast emails.  All of us have our own phones and tablets.  There is one family computer that uses eM Client email program to organize all emails that come in.  When I set up eM Client I used POP3 as the receiving protocol and it worked for years.  In the past month comcast will not sync with eM Client consistently (only eM Client, everyone gets emails on their phones during this time).  I will go a full day without emails from anyones comcast account coming in and then the next day, after restarting the computer - 120 emails will roll in.  I'm just trying to understand if I have incorrect email settings or something in security is causing the issue.  Current settings: POP3, port 995, SSL/TLS, leave copy of messages on server.  Additional helpful info - I have trouble in general with xfinity and the xfinity website on my computer.  I've tried to post this message 10 times and the sign-in popup just goes around and around.  Yesterday I reposted something twice because there is no indication that the first post worked.  If this posts - I'm on an incognito window on Chrome to get it to work.  

I completely understand how this could become a frustrating situation. Have you tried signing out and back into your email platforms?