The new lesson builder doesn't save copy pasted text. And, doesn't allow you to go back and edit copy pasted text.
I opened a ticket but was told to leave feedback here.
I get you always want to improve which is one of the reasons I love HL, but, when improvements make original features no longer work, it's frustrating. We don't want to solve one problem by creating another (smiles). Can this be looked into ASAP. thank you!