I've seen multiple times in the last few months, POUG being offered at (or before) online check in and when you click through it fails to complete, depending on the platform (app or website) it has some variation of 'an error occured' / 'your request could not be completed'.

I've generally ignored it not having the time to follow up but on the few occasions I've had a few spare minutes either the GGL line or the social media team have been able to fix it relatively quickly. I gather they manually ticket it at the same price as offered online.

They seem to have no idea why this happens aside from a vague comment about travel agency bookings. I can only recall it happening on agency bookings (but they are 90% of my travel so law of averages etc).

Does anybody else get this or is it just me? Any idea why it happens?

FWIW flights are always short haul (though only because I book long haul in J to start with and I've yet to get a POUG offer to F).