Unable to connect to one specific website " took too long to respond .ERR_CONNECTION_TIMED_OUT"

Using the same modem for the past month with the same subscribed speeds I have been able to connect to my website with no issue at all.  As of this past Saturday the site comes up with an error "(Website) took too long to respond."

All the following devices are connected to the same modem and network:

Not working on:

Desktop PC running Windows 10 - Hardwired
Surface Pro 7 running Windows 11 - Wifi

Works on:

• Pixel 6 Pro - Wifi

Notes:

• Only affecting this ONE website
• Website is fully accessible outside of my home network
• I tried connecting to the websites IP address in order to bipass the DNS and receive the same results
• I have used Chrome, Brave, Firefox and Edge with same results.  Cleared cache on each browser.
• When connecting my Surface Pro to the neighbors xfinitywifi network I am able to access the website with no problem at all.
• I have no VPN's enabled on any of the devices.
• I reached out to Xfinity chat support and the agent insisted this is being caused by my modem.  The reasoning is, "the speeds you are signed up for do not work well with the modem you are using".  After insisting that this has nothing to do with this SINGLE website not working they still told me to replace the modem and that it would solve the problem.
• After speaking with phone support the agent was going to reach out to "advanced support" and put me on hold for 10 minutes with random call center chatter in  the background and never came back to me

Any help or insight would be appreciated