mon première amie or ma première amie

Question

I learned that "ma" changes to "mon" if the female noun starts with a vowel, for pronunciation.

But does this "mon" changes back to "ma" if there ist another adjective in between?

(maybe not very relevant to this topic, but by seeing the examples, it reminds me of this)

Maarten Kamp · Accepted Answer

Li p.,  
‘ ma ‘ ( ta, sa ) will only be replaced with the use of ‘ mon ‘ ( ton, son ) when the word  immediately following the possessive adjective starts with a vowel or h muet . 
Therefore, you would never use ‘ mon première …..  ‘ and only the 2nd option you give is correct.
https://progress.lawlessfrench.com/revision/grammar/use-mon-not-ma-with-feminine-nouns-starting-with-a-vowel-or-mute-h-possessive-adjectives