Hello,
So I´ve made a lot of test and I think the problem is that %VAR1 does not accepts line breaks.
Could you try this text in the same app? https://mynewtestapp.bubbleapps.io/version-test/sendgrid_demo?debug_mode=true
This text:
"Hello,
I´m a user.
Let´s make this happen."
I´ll wait.
Thanks a lot.