For years I was traveling for work, 300+ days a year. I used booking.com almost exclusively and never had this problem.

I did however run into an even worse bug on their platform once where my card got billed, but right after the website crashed and a confirmation never was sent. Naturally, this happened when I had little funds myself.

I called customer support and without a booking number they couldn’t do anything, which I naturally never received…

Thankfully, the money was refunded within 24 hours.

Still I use booking.com, I consider it a great service.