Some text are not translating

Hi,
I have some problems with translating some text of woocommerce plugin. The problem is only for some text. This is happening for the “additional content” text of on hold, processing, complete emails. The email is sending with the English text always without translating.
Strangely it is translating the text of new order email for the same field additional content!

I think it is happening because I changed the text of that field. But even I revert it back, it still not working. Please help.

Thank you.