Outlook Mac - Glitchy formatting behaviour

As promised, here are some troubleshooting steps provided by HubSpot Support.

Thank you for reaching out to HubSpot Support. I understand that your sales extension is causing issues in your email inbox. Just to clarify and confirm, are you using the Outlook desktop add-in or the Office 365 add-in? If you are using the Outlook desktop add-in, these are some troubleshooting steps we can take a look at:

  1. Check to see if there are conflicting plugins installed
    1. Go to File > Options > Add-ins and click GO at the bottom of the screen
    2. Uncheck the boxes next to the other plugins and click OK
    3. See if HubSpot enables and works
  2. A slow network while using Outlook on a PC can definitely slow things down so let’s make sure it’s not an issue with your network speed.
  3. If you are using an Exchange account or an Office 365 account, ensure that Cached Exchange Mode enabled.
  4. Does the friction happen when the Track box is checked? When the user clicks the New Email button? Try to see if anything in particular causes this.