Third language? Yes that could be a problem!
Try reading out loud before you send and guess the emotions while reading. This helps me and most of the time I correct my text before sending it. And don’t even try to send something with strong emotions both positive or negative as that almost always comes out wrong 🙂 Just my own experience. I lived in US for 15 years and learned to be very careful and finally I got many praises by my bosses how my written communication is clear etc. Hahaha, I was not even trying to do that but only to not make a mistake!
Corrected this note three times before sending it 🙂