For some trinkets, while Mom's Box is held and their effects are doubled, the item description displayed is not the entire item description, but instead only the description of the golden version's changed effect. Here are two examples I found:
A player who isn't familiar with the base effects of the trinket would therefore not know what the full effect is. I believe this is happening because for these trinkets, the intended use is to display the original description followed by the added description of the doubled version. Compare to a properly displayed trinket:
Because this trinket only has different numerical values in its upgraded description, only displaying the upgraded description is correct here.
Playing on Rep+ with no mods, in Cat Got Your Tongue challenge but I doubt it makes a difference. The effect is likely the same with golden trinkets.
For some trinkets, while Mom's Box is held and their effects are doubled, the item description displayed is not the entire item description, but instead only the description of the golden version's changed effect. Here are two examples I found:
A player who isn't familiar with the base effects of the trinket would therefore not know what the full effect is. I believe this is happening because for these trinkets, the intended use is to display the original description followed by the added description of the doubled version. Compare to a properly displayed trinket:
Because this trinket only has different numerical values in its upgraded description, only displaying the upgraded description is correct here.
Playing on Rep+ with no mods, in Cat Got Your Tongue challenge but I doubt it makes a difference. The effect is likely the same with golden trinkets.