Good workaround. In the process of working through the same issue, I ran across another workaround from Ken Stone’s website: https://www.kenstone.net/fcp_homepage/chapter_marker_lists_stitzer.html
Then I applied it with some other steps:
-Used Premiere on the timeline with chapter markers already made, exported the marker list (.csv file).
-Copied and pasted all of the timecode values from the spreadsheet into a text editor.
-Followed Ken Stone’s instructions for the format of the marker list that DVD Studio Pro would take.
-Had to use the find and replace function in the text editor to replace all of the semi colons with colons.
-Imported marker list into DVD Studio Pro and it worked like a charm.
A little long but the process worked!