Dear @ccz und @jjharner
I just wanted to reach out for saying that you helped us a lot in finding out this bug. It was everything but easy to find out why, but we now know and we are implementing. Quite difficult to explain the cause in a few words, but the issue is delivered from a dismatched Format translation of the date input that at the same time converts also the time zone (but only when a timezone is not known). Therefore we could't explain to us (at that time) the fact that we hadn't a larger amount of other similar feedbacks.
I'm sorry that you had to experience the consequences of this bug.
Many many thanks for the support on that! Hope that you had a lovely stay in Switzerland.
Customer Success Manager SBB.ch