I'm having a problem with importing comments too - I've managed to import entries for all of my communities, but the comments are repeatedly failing on the largest one ('u2lj'). Do I just need to keep trying periodically? There have only been like 5 new comments since Dec 2017 so it's not a huge deal, but it would be nice to have them on here.

(I'm also curious as to why my personal LJ account has 19,036 comments received but only 19,035 have been transferred to DW. Any idea what would cause one comment to not import?)