Homebrew Spell Attack/Spell Save DC Modifiers Ignore Fixed Values

I'm experiencing an issue with homebrew magic item modifiers. I created a homebrew magic item intended to grant:

• +1 to Spell Attacks

• +1 to Spell Save DC

The modifiers are configured as:

• Modifier Type: Bonus

• Modifier Subtype: Spell Attacks

• Fixed Value: 1

and

• Modifier Type: Bonus

• Modifier Subtype: Spell Save DC

• Fixed Value: 1

However, when the item is attuned on my Sorcerer character, the item always grants +4 to both Spell Attacks and Spell Save DC instead of using the fixed value entered.

I tested multiple fixed values (0, 1, 7) and all three resulted in the exact same outcome:

• +4 Spell Attack

• +4 Spell Save DC

If the Fixed Value field is left blank, then attuning to the item causes no modifier changes at all.

Troubleshooting steps already attempted:

• Recreated the item completely from scratch

• Used Wondrous Item Magic Item Type

• Avoided copying/duplicating old items

• Removed all modifiers except the two listed above

• Tested with a simplified item setup

• Re-added the item to the character

• Re-attuned the item

• Refreshed the character sheet

The issue still persists.

This appears to be causing the modifier to ignore the entered fixed value entirely and instead apply a static +4 bonus.

Please let me know if this is a known issue or if additional information/screenshots are needed.

Ignoring that refreshes can take time, but since you are testing with a sorcerer, did you try Modified Subtype "Sorcerer Spell Attacks" and "Sorcerer Spell Save DC"?