Insert Text within a Numbered List

1. Item one
2. Item two
3. Item three < Use shift enter right here
   Insert more text
   And even more text
4. Item number four

Support Update

Eventually TB Team would like to address this automatic numbering issue, but it's not easy to resolve, and it may be a while before they can get to this.

In the meantime, another option is simply to number your items manually.