Saves unencrypted file to google drive

gsco

When I open a boxcryptor encrypted file located on google drive from my mobile device using the boxcryptor app, it saved the unecrypted version on google drive. The file is a LibreOffice - .odt. After I closed the file, I had to manually delete the file from google drive. The behavior happens consistently. I was surprised it did this. Am I doing something wrong?

gsco

One point of explanation. When I open the file, it saves it as a Google Sheets file to google drive. So I suppose the error is happening by using sheets to open the file instead of another method that doesn't compromise the encryption. Is that a safe guess?