Not really, as soon as the loan is repaid the bank is whole. The loan originates in a non-Chinese country so when the loan is extinguished the bank has the value of the loan plus interest.

Only if the loan defaults does the bank run any risk of having capital trapped in China. Worst comes to worst they use the capital in China to originate more loans in China. Any bank offering this service has a presence in China so it's not a big deal anyway.