string-length() for decimal questions is unreliable

[abureaux]

So I was trying to troubleshoot something, and I noticed that string-length for decimal questions stopped behaving as expected for longer numbers.

Here was my set-up:

And results:

At a certain point, string-length() stops working properly on decimal fields. It's misleading, because it does work for smaller character counts, but then stops working around 15ish characters.

• All "1" breaks at 22 characters
• All "9" breaks at 15 characters

I thought, "well, convert decimal to string and problem solved?". Nope. In this example, I first convert the value to a string: