can anyone explain? buyer bid on my item, then bid disappeared,

[joycroft10]

,buyer then bid on my similar item newly listed, how can they do this this with no contact with buyer,?

[*crikey*mate*]

They retracted their bid.

Can I retract or cancel my bid?

They were able to bid on your item/s as they are not on your BBL or if you have the relevant generic blocks in place they are not affected by them and don't meet their criteria for exclusion.

Managing bidders and buyers