Long lines in editor stop color coding

So just discovered that if you have an exceedingly long line in the editor it turns off the color coding of your code.

line one after comment is not long enough to cause it.
but the next line is.

It doesn’t otherwise cause problems and it turns off the color coding in real time, that is if I keep cut and pasting xxxx xx xxxxxxxxx etc. into the string part of the new_text_node call it eventually turns the entire line white the second I cross the threshold.