Do you dislike it when people write "yeah" as "yea"? I know someone who always writes "yea" in texts when they mean "yeah". "yea" is a different word with the same meaning, but a different pronunciation.
Usually, in my experience, people write (and say) yeah, which is pronounced more or less like แย. Yea is usually used in more archaic contexts as far as I can tell and is pronounced more like เย.