Help needed using custom font + standard font inside a single text element

Hi dear Bubble community,

I am struggling to integrate my custom font to text elements when I use both my standard font “Open Sans” and my custom font “Alkaline” within the same text element.

I would like my text to look like the following :
image

It actually looks ok in the editor, but it’s not working at all on my app (from what I see in the test environment) :

What is written in my text element is [font=Alkaline] TEXT I WANT TO CUSTOMIZE [/font].

Anyone knows what I am doing wrong?

Thank you in advance for your help!

Pauline