Text color changed at the beginning of a line doesn't persist after pressing enter to go to the next line

Steps to reproduce:

1. Put cursor at the beginning of a new line
2. Change text color
3. Type some stuff
4. Press enter to go to next line and type some more

Expected behavior:

Text will still be the changed color.

Actual behavior:

Text changes back to the previous color.
Note: doesn't seem to be an issue if you change the text color in the middle of a line. Only at the beginning of a line?

Other unexpected behavior:

When collaboratively editing in 6.4, it seems like text color persistence can behave sporadically as well. (Maybe it also happens when not collaborating, but haven't seen it) Some example behaviors:

• Can't change the text color at all at the beginning of a line
• Changed text color and started typing in that color, but after a couple seconds, the whole line suddenly changes color while you're typing
• Someone else types something in a different color. I go to type something on a different line. Another line of seemingly unrelated colored text suddenly turns a different/previous color