fickle

One difficulty is that consumers are somewhat fickle.

Even then, I worried that mine was a fickle nature.

That said, there’s a lengthy enough record of futility to suggest more is at work than the changeable mood of a fickle electorate.

"And when that happens, it's hard. Fashion is a fickle beast, people move on quickly."

Charles Allen, an intelligence analyst at Bloomberg, said River Island had failed to keep up with customer tastes which, he said "can be a bit fickle" but the retailer had found itself without "anything striking".