I can relate, thought i was the only one having this exact thinking. It is not a coincidence, once it happens regularly to different people that tells us it was designed by the casino to happen that way. Not just on tumble but they give little profits seeing your bankroll decreasing this also make gamblers believe they will be hitting huge profits soon and won't leave the casino.
Developers and neuroscientist work closely to understand the way human brain reacts to certain designated actions. The casino would always go further to advance on this method or approach to maximize profits from players. It's all left for the gamer to be self conscious and organized at making a first stop or taking a break at a point of dilemma, else the mistakes could pile up to more losses.