Welcome to the community!
The modem/router has the latest firmware version. In the event that Wireless device(s) is affected with the issue we did an article that you may find helpful, this will guide you on how to improve the wireless connection at home.
Please see links below.
Easy Steps to Improve Wi-Fi Connection In Your Home.
Wireless Channel on your modem - what is it and why should I change it?
Let us know how it will go,cheers!
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