Precursor Tablets (all non-unique) still highlight as "exaltable" even when at four mods

Steps

* Get a Precursor Tablet of any non-unique variation or rarity.
* Put four mods on it (transmute -> augment -> regal -> exalt).
* Click exalt again to attempt to apply a fifth mod.

All precursor tablets will highlight in your inventory as if they can have a fifth mod applied, when they cannot.

I think before you unlock the ability to make rare tablets, the same issue occurs with regal orbs, where they will highlight tablets as a viable target but you can't use them.