Its actually a common misconception among new players who go online.
Yes it pops up from time to time so seem to be at least somewhat common.
What they actually mean is some kind of automatic superuser and not classic poker bots.
But even that makes no sense, since a superuser can take advantage of their knowledge in lots of other ways than getting their chips in bad and then sucking out on people. Like bluffing only, when their opponents are weak, valuebetting thin with hands (https://www.casino.us/poker/strategy/poker-hands/), that would normally need to check and making huge folds, when they have a strong but second best hand.
There are literally 100`s of hours of footage of Mike Postly playing with superuser knowledge, so we know exactly, what this looks like, and he did not win by putting bad beats on people. Also all known cases of superusers have involved knowledge only of the cards already dealt to other players and not the community cards yet to come.
So it would pretty much need to be the house itself, that put out these "bots" to cheat their customers. Which again, if they really wanted to do that, there would be much easier and less obvious ways like giving their "house bot" AA and the victim KK. But as also discussed a million times, there is really no need for sites to cheat in this way, as they are sure to profit anyway due to the rake, that players pay.