Hi @svalais,
I’ve seen that weird behaviour before, and I believe it is related to not using the official font sizes in Silverfin.
Could you try with these font sizes instead?
I’ve checked it with me locally and I could simulate the issue:
As you can see, the font size you use, doesn’t even respect the text attribute with all the breaks.
{::font size='xl'}{{ period.custom.some.txt }}{:/font}
So I strongly advice to use the official font sizes, which is exactly the reason we made them