Flatness requirements for bamboo laminate flooring
It's really hard to provide objective advice. There are many factors, and the shape of the irregularities is critical. 


Is it a gentle curve or a hard angle? 
Does it curve in several directions? 
Is there more than one such issue? 
Do you have multiple underlayment options, whereby an upgrade could help mitigate the concerns? 


It would take a booklet to lay it all out. I'd stick with mfr specs + maybe 25%.