Trying to book ICN-FRA-DUB on 8/19 on LH via Lifemiles. When searching the segments separately lifemiles shows F availability ICN-FRA and J availability FRA-DUB, but when searching as a single route lifemiles only shows J availability ICN-FRA-DUB. I know this should work as I booked & flew this exact same routing with mixed F/J class of service via lifemiles a little more than a month ago. Any ideas how to get the system to show the F availability when searching for the single routing? I'm wondering if this is related to the slightly different way the website is returning search results recently (where you have to click through an extra "mileage from" window to get the different options for class of service). I've dealt with their call center in the past and sure would prefer not to have to do that again ...