sack nanny after neighbours spoke to us about observed behaviour

[oldshprite]

we’ve employed a nanny to cover for our regular one over the past 2 weeks and we were planning to continue part time in the future, to supplement our reg nannys hours. found her via a babysitting website, so no personal recommendation. she seemed ok, not super warm at first but ok. we had a visit from the downstairs neighbours today, they came to say they are concerned about the new nannys behaviour as theyve noticed her visibly annoyed when our child was crying and left her to cry at some distance from her ‘for a long time’, displayed lack of patience, etc.
i felt as if i have no other option but to sack her, immediately. aibu? feel a bit bad in not giving her a chance to explain/investigate but equally feel uncomfortable leaving my child with her

I'd certainly find out what happened first. Something similar cropped up with SIL a few years back. Her neighbours passed on salatious stories about the 'Nanny' and SIL duly fired her. Only to then find her working for the neighbours. Turns out neighbours really liked her, and tried engaging her services only to be turned down because she was working for SIL.

Why on earth did you feel you needed advice on this? Unless you know that the neighbour has it in for you for something else, why would they invent this. Why bother to ask the girl why since that's irrelevant. Get her away from your child ASAP.