Fortitude in party

I have 26 maximum fortification with fortitude.
My friend in party has 20 maximum fortification with fortitude.

When I'm alone, UI correctly says 26 fortification.
When my friend party is in range it overrides and says 20 fortification.

Shouldn't work like this since we can have different maximum and temporary buffs to fortification. They would be useless when party member has fortitude.

Don't know if this is just a visual thing or real.

I'm also experiencing this. My fortification is higher than my party member's, but his is overwriting mine at a lower value.

Need a fix for this, I have 49 fortification but when I am in a party with another champ with less if i get close i only have whatever he has even if its only 20.