Validation Error BR-Z-08

[OnlyDex]

we have an invoice which fires the Business Rule BR-Z-08. The Calculations are correct. I remember, that there was an similar issue with BR-S-08. There was the solution to add decimal casts. When I also add these casts in the BR-Z-08 the invoice is valid und all fine. I used these samples, ZUGFeRD and XRechnung:
samples.zip

Maybe this issue is also in other Rules (BR-O-08, etc.)