I was just after some advice about an issue I have.

In March I booked a trip for myself and my partner to the USA from London,UK using the Lufthansa website (I am a LH senator/ * G).

The outbound leg is a LH codeshare operated by United, and the return (via Frankfurt) is operated by Lufthansa. Both in economy.

When I booked I was able to select seats on all the flights including premium economy on the United operated flight. All of my seat selections were confirmed and I have documentation from March to show this. I assume I was able to select premium economy due to being an LH Senator and the codeshare being a LH/United atlantic journey where the 2 companies share e-ticketing and revenue share.

Yesterday my waitlist to upgrade both of us to business on the LH return leg was cleared and I went into my booking on the LH website to select seats.

At this point I also took a look at the seating plan for the outbound leg (also within my booking on the LH site) and I decided to move my seats slightly in the premium economy section as it was giving me the option to do so. I moved the seats back a few rows and confirmed the change. The booking is then saved, but when I went back into the check the booking the seats on the outbound leg were listed as "(requested)", and some minutes later as "(not possible / cancelled)". At this point I tried to re-select my original seats (which had been confirmed since March) but the same thing happens.

I rang Lufthansa and they are not sure what is going on - they said they can see I had confirmed seats in row 21 (2nd row of premium economy) from my booking history but cannot even access the seating plan for the flight on their system at the moment. They suggested calling back in a few days.

Any idea what I should / can do or should I just wait until checking in at the airport?