Unreliable newlines when composing reply message, especially around images.

When composing reply messages, newlines are handled very poorly and unreliably:

1. Sometimes pressing enter does not insert a newline. Pressing it again then does insert the newline.
2. Sometimes what looks like a newline in the message composing window results in a message without a newline.
3. Sometimes what looks like a newline in the message composing window results in a double newline in the message.

I don’t have exact examples for all, or exact ways to reproduce, but the issues are especially prominent when also inserting images. Note that they are not EXCLUSIVELY around images. For example, here are some screenshots of me composing a long message with some screenshots:

The result is a very poor and unprofessional look for my customers.