I can say, that's normal. Yesterday, i saw on other popular crash game site, it has 12 streak losses under 2x multipler. If you think 14 losses aren't normal, that site will bankrupt since you only need bankroll which can cover your losses 14 times in a row. Each hash also unique, you can't say it's not normal too since no one knows what's the next result from each next hash.
The only thing I really not test on crash is when it is on automatic mode and martingale because I feel like this kind of thing do happens as well as on dice. I think that's normal but for someone who are new and experience betting on it with high multiplier will really freak out especially if they are huge bettor.