When choosing the XI “Grenadier” in the Explosives trait, the tooltip hides the damage value of Shrapnel Grenade.
I’ve also seen the bleeding damage disappearing in the tooltip when it shows the bonus effect from Steel-Packed Powder (25 Points in Explosives). But I don’t know how to reproduce it because this bug seemed to disappear after I reallocated my traits.
There are probably alot more bugs like these since that change with the blue colored, indicated facts.