It's not incredible at all, this is a slot with an average feature frequency of 1/460, so at 1600 spins you're into 'unlucky' territory but nothing out of the ordinary or beyond expected behaviour whatsoever.
When slots that have an average feature frequency of less than 1/200 spins can and will go 1000+ spins without a feature on a bad day, Bonanza can and will do 2500-3000+ spins without a feature if you catch it wrong.
That's what you paying for that higher than average feature pay of nearly 100x with.
well now over 2.5k spins no bonus and still counting......