If a "Guidelines" notice contains a list with "lower alpha" style elements (a, b, etc. instead of 1,2,...), it appears correctly in the preview, but when saved and viewed at https://beta.groups.io/g/.../guidelines the list has numbers instead of letters.
STEPS TO REPRODUCE:
Admin->Settings : Member Notices
Create or edit the "Group Guidelines" notice
Then select the 3 lines in the middle, and make them a numbered list using "lower alpha" labels (in the drop-down menu for creating Numbers Lists). The three lines should be labeled a,b, and c.
Now visit the group's "Guidelines" page...
The list appears as 1,2,3 instead of a,b,c
FWIW I tried Firefox and Chrome browsers; both show the list as 1,2,3 in Guidelines