"maxLength of ReplaceAll when using generate attributes?"

I'm using a regular expression to generate a new attribute but run into an error once I exceed 1984 characters. Is this like a bug or just code limitation?

The expression itself is ok, testing it on the string gives the expected results, and it works fine for the rest of my examples as long as they remain below a given amount of characters. Is there a way to 'bypass' this issue? For now I trim my strings to avoid the problem but I may loose information I like to keep.