Did a search within thread so hopefully this is not duplicative, but...right at T-30 days, I started seeing this at the top of my reservation on LH. Was not there prior.
For context this is a 016 ticket, upgrading LH454 from D class, waitlisted for O via UA PlusPoints - currently EF showing F7A6. When I look at the "Extra services" part of my reservation it just says FRA>SFO 1x Mileage upgrade.
Given all of the comments upthread, I suspect I should just ignore this message and let the waitlist do its thing...since calling LH seems to just inevitably mess things up. Just sanity checking though.