Outlook and Quickbooks freeze when emailing

When emailing a single form (invoice / statement / etc) from Quickbooks using Outlook 365 and I save a draft of the email, both programs lock up and I have to go through the task manger to end both programs and have them reload.

I need to at times save the email in my drafts folder because at times I have other attachments I need to send that are not from the Quickbooks program.

I never had this issue using our previous version of Enterprise Desktop (v13).