Unable to figure out "Grow if possible" option in flex-child

I have three flex children, I’m setting grow=1 for the first two flex children and selecting ‘Grow if possible’ for the third flex child,this is how it looks.

I’m unable to understand why the content in the third flex child got wrapped to a new line even though I haven’t added a line break.

PS : MONSTERCAT NEWS was added as a single line, no line breaks in between the two words.

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