Bank: Termination of the mortgage loan within the fixed interest period?

The following scenario:

A mortgage loan with a fixed interest rate for 20 years. The borrower may terminate after 10 years, but what about the bank, is it allowed to do so without an important reason (e.g. payment default)?
What happens if the bank sells the mortgage including the collateral? Is the new owner allowed to terminate within the fixed interest period?
Thanks for the info

Clear answer: NO! ==> see Building Code §489 (special termination right of the BORROWER) However, the bank may terminate if there is an important reason (e.g. payment arrears). But this has nothing to do with the termination right after 10 years. It applies regardless of who is the creditor of the claim.