Several times now I have tried to make different races and subclasses that have an unarmored AC that does not use the Dexterity score. However, whenever I try to use the Ignore modifier, it does not ignore the dex bonus. I have followed different forum instructions to a tee, but with no success. This bug needs to be addressed, either by making the modifier work as intended, or making unarmored ACs easier to implement.

I even referenced the Loxodon to see how their AC is set because they also use they have a Natural Armor that doesn't include Dexterity, and the their modifiers are identical to the modifiers I used, so this is a bug.

Last Edit: My apologies, the modifiers finally worked, my only question is why did it take so long to work, even though I had these modifiers from the start?

I can think of a few reasons.

It could be that changed you made to the homebrew took a while to update on the test character.

It could be that you had a better AC using Dexterity (the character sheet automatically uses the best AC calculation if there are multiple).

Quote from Bimblor >>

Last Edit: My apologies, the modifiers finally worked, my only question is why did it take so long to work, even though I had these modifiers from the start?

 
Please see the General FAQ #6-A: (https://www.dndbeyond.com/forums/dungeons-dragons-discussion/homebrew-house-rules/131411-a-homebrewers-how-to-faq).

When making changes to homebrew, it can take up to 15 minutes for them to get updated on existing characters.

It is because of memory caching on the servers.