Online seat booking issues

Hello,
I've logged into both my bookings today, when viewing the seat allocations, they have all been removed and reset so the seats I had originally booked were not showing.
Has anyone experienced this before? It only effected my UC flights, PE seat selections were the same.
No change to aircraft or dates. I simply reselected and it worked.
Wondered if it's a system wide technical issue or just me?
Luke
I've logged into both my bookings today, when viewing the seat allocations, they have all been removed and reset so the seats I had originally booked were not showing.
Has anyone experienced this before? It only effected my UC flights, PE seat selections were the same.
No change to aircraft or dates. I simply reselected and it worked.
Wondered if it's a system wide technical issue or just me?
Luke