Netgear cradle delivers intermittent wifi signal DC112A

I have 2 of these cradles - both exhibit exactly the same problem. I have a 790s sitting in it

When I have the 790s out of the cradle and I connect to it, my broswer works perfectly. No problems. When I connect through the cradle, I get web pages that hang waiting for data from specific URLs - all browsers do it, but Chrome is the worst.

When I am using chrome, I can have a page that hangs and does nothing while it waits for data. If I then open edge or firefox and paste in the same URL, it will download, and then chrome downloads too. It is NOT a chrome problem though, it is just the way that edge and firefox deal with blocking which is different. Edge and firefox both get blocked too, they just continue downloading other files which is usually enough to display the page.