Hi ! Also for you is Hubspot CMS text editor using bold formatting instead of strong tag ? If not, is it possible to force bolding with the strong tag on the CMS?
Are you referring to a rich-text editor module? If so, the module should support standard emphasises (bold, italic etc). You can customize the default operations of the rich-text module as per this guide.
Let me know if you have any further questions. Best, Joe (HubSpot Moderator)