We never do such tricky things as silent changes of any settings. I wonder if it even possible with so many players and open stats.
Even minor changes are always visible and we always announce them in advance on our official Portal.
Nevertheless, there are too many setting. And sometimes bugs happen. They are always reported with evidence and investigated asap. And we always tell about them.
There were situations when some justified reports from our players led to the fixes. So thank you for raising such questions from time to time.