I recently created a new game world with a homebrew magic item that functioned similarly to an Undead Warlock’s Form of Dread feature, with a DC 20 Wisdom Saving Throw to resist. However, when I tested it out, the DC appeared in chat for a single frame before turning into a DC 15 Dexterity saving throw. I initially assumed it was because I did something wrong when creating the item, but now, this is happening to some of the monsters in my compendium that have features with saving throws to resist their effects.
Granted, this isn’t happening across the board (the Balor’s Death Throes still called for a DC 20 Dex save, and the Archmage’s Cone of Cold still displayed a DC 17 Con save, etc.), but it’s happening to enough monsters to warrant some concern. And while I don’t think the aforementioned magic item in question is the culprit (seeing as how this problem is affecting features that have nothing to do with it), I’m not going to rule out the possibility. Also, as far as I know, this issue isn’t present in the other game I run, so this is very confusing for me.
Any advice would be greatly appreciated. Thank you in advance.