Inconsistent decimal separateor

I just added a new invoice. The decimal separator for 'quantity' is a period. But, the decimal separator for 'price' is a comma. This appears inconsistent.

Hey there? I've seen so many of your questions go unanswered. Did you bother sticking with this software?

Indeed. I’m using the free version of this product, so in a way it’s understandable that the support I receive is limited. But, as I’m reporting what appear to be bugs, I would expect responses and fixes.
The latest major update seems to have introduced quite a few bugs, which certainly is not convincing me to start paying for this software. But also, moving to a different package for managing invoicing and accounting is a hassle. :/