Yes your concerns are real but apply to all solid flooring not just bamboo.
Is bamboo flooring good in dry climates.
Bamboo is eco friendly up to three times stronger than other types of wood and highly attractive and stylish.
There are horror stories about both bamboo and hardwood floors that buckle and crack inhot dry climates and these same complaints are often heard in very wet climates as well.
As long as you acclimate the flooring for 14 days you ll rarely experience any issues with bamboo flooring in a humid climate.
If the flooring is installed in a very humid climate the moisture in the air can cause the floor planks to swell and buckle while in a dry environment the planks can shrink.
In conditions of extremely high or extremely low humidity bamboo flooring is more likely to crack than is hardwood flooring.
In extremely dry or humid climates it can do unexpected things or it can do nothing at all we ve seen plenty of both happen and proper acclimation can minimize it.
These climates are actually very suitable for bamboo flooring because they have relatively stable humidity year round even if it is higher than normal.
In short bamboo flooring despite what the retailers will try to tell you seems to be more suitable when building for what are classified in the trade as hot humid climates and can be problematic as the op has discovered when building in drier climates.
Tropical or humid climate.
Bamboo is a popular option for people who refuse to sacrifice beauty or durability in flooring.