Can't properly open some HTML emails

It is ironic that one of the emails that never open in 7 is the RB Community Forum Summary. I use Edge and some emails with HTML content just won’t open, such as your Forum Summary email. Some open after a delay that varies. Home Depot emails never open either and I am sure there are many others. I keep a link to RB6 for these emails. I have asked about this before and there have been many updates without any improvement. Such a shame that you can’t fix such a fundamental flaw in your product.