Selecting the thrust levers to the TOGA detent, even momentarily, will engage the Go-Around mode,
and. ‐ In some aircraft selecting the thrust levers above the CL detent below 100 ft RA will disconnect the A/THR. In this case, returning the thrust levers to the CL detent will set climb thrust. Refer to FCOM DSC-22_30-90.
Oops, that might make things interesting...
Not the loss of autothrust itself, but the unexpectedness of it... Is it an A330 specific thing, or do A320 have this as well?