This is a CommonMark rule exception for ordered list markers.
The following rules define list items:
Exceptions:
- When the first list item in a list interrupts a paragraph—that is, when it starts on a line that would otherwise count as paragraph continuation text—then (a) the lines Ls must not begin with a blank line, and (b) if the list item is ordered, the start number must be 1.
Both hello and bye, as used in the example, are considered paragraphs by CommonMark.
A sequence of non-blank lines that cannot be interpreted as other kinds of blocks forms a paragraph.
Each paragraph is interrupted by a list, which does not need an empty line to separate the paragraph from the list
In CommonMark, a list can interrupt a paragraph. That is, no blank line is needed to separate a paragraph from a following list:
Example 273. (...)
In conclusion, the first rule mentioned is applied to the list items in paragraph bye because they interrupt the paragraph without a blank line in between, and in that case the exception is that: "if the list item is ordered, the start number must be 1".
The solution would be to use a blank line between the paragraph and the first list time to avoid the mentioned exception that will otherwise force the numbering to start at 1.