Washer estimated "1 minute left", took 13 minutes to finish

The whole wash was estimated 72 minutes when it started.

It weighs the clothes by inertia in the beginning, I didn't overload, and the water (hot and cold) comes in fast through thick pipes, so there's no excuse for this.

How dumb must the program be to estimate one minute left in the beginning of the rinse cycle with two rinses and a spin cycle to go?

The building and presumably the machine were made 2018, and the maintenance log on the side says many repairs have been made since, so the software must have been updated many times already.