Wrong ios-cog-outline icon displayed on real iPhone

I’m using ios-cog-outline like following:

<ion-icon ios="ios-cog-outline" md="ios-cog-outline"></ion-icon>

When I test it on a real iPhone 6 this icon isn’t displayed as expected.

Following the documentation (https://ionicframework.com/docs/ionicons/) I should see something like:

image

But actually I end having an icon like following displayed:

image

Could someone confirm that?