ADDENDUM: I found that this crash/freeze also happens in "customer center", choosing a customer and clicking the hyperlink for their email. Message comes up that "your email is not compatable...". Only way out is to end QB app via task manager.  We use Outlook (microsoftonline) in browser, not desktop app.  Secondary call to QB Support, got me to Tech Support. Confirmed issue was QB based, not my hardware, OS, antivirus, or outlook. Confirmed two issues ongoing, since summer of 2021:

INV - 0671 and INV - 45586. Cannot confirm how those two investigations overlap.  Also talked to Merchant Services about a method to incorporate a hyperlink for payment in an out-of-QB email.  NO CAN DO. Only method is outside ACH to your bank or take CC info from customer and enter in QB "merchant services".