I called the bank today, the offer from 1.6. at 1.99% for 20 years was corrected to 2.49%!
And now are you waiting for another reduction? Or are you closing the deal now? What does the realization that interest rates (unfortunately) are variable (also upwards) lead you to?
It's a bit like trying to catch the desired train at the station. You don't want to be there too early, but still just manage to catch the train. Sometimes you only see the taillights.
This also has a bit to do with a "being-cheap-is-cool mentality." To get the best possible interest rate that can somehow be achieved. Then you are offered 1.99% for 20 years and it's still not enough. There could be more, they are still "too expensive."
It is often a very strange behavior.