heavy stroke added to text creates spikes on specific characters

Hi,

I remember a resolution for this years back, but cannot find it.

You add a heavy stroke size to text, and specific letters create spikes. If you select the rounded caps, it disappears; but I want the geometric stroke outline around each letter that the corner meter join creates.

How can I resolve? (Note: I know there are workarounds with outlining the text, etc, but I'd like to keep it live and editable)

Thank you.