A clogged drainage filter will make it take longer than anticipated. It’s usually lack of maintenance when these timers get THIS bad.
But even different materials hold water differently, it’s all an estimate based off of averages. Washing bedding or wool items? Probably gonna be 15% longer.
Mine has a filter light that comes on after a couple months or when it detects slow draining. Techs expensive and people buy cheap appliances. Than bitch that they aren’t fancy.