Custom SVG not display in H (generateblocks)

Hi there,

Is this common issue that a custom svg (made with illustrator) is not displaying well without forcing it by CSS ?

I'm using it in a generate blocks Heading element and inspecting code I saw that there was a display : none applied to class .st0

I forced it to be diplayed, but it's weird behaviour there no ?

Thanks for your help

PS : this is the yellow "heart/brain" SVG icon above heading "La sophrologie" you'll see in the middle of the page shared in private information.