Booking.com changes formatting of our PMS emails

CloudBeds is our PMS. We use Cloudbeds to send emails to our guests on Booking.com when they make a reservation. We need to do this, as opposed to using the Booking template system, because we need to pull specific data you don't have access to, including specific room assignment and door code.

However, we have found that when our emails go through the Booking.com system, they have very odd formatting, making our company look sloppy in terms of how we communicate. I have literally tried everything - creating the email in a plain text environment so there is no hidden coding, using a different font. The issue is always spaces in the middle of words. And it is random. There is no consistent pattern, making it absolutely maddening. Sometimes the font is different for one sentence. Maddening.

For example:

— DOOR C ODE: You should receive your unique door code 1-2 days before ar rival.

Any suggestions greatly appreciated, thanks!