Looker Studio Bug

Hi everyone,

I am trying to figure out a problem with Looker Studio. I have created a dashboard where we are anaylsis the in two sections, PoP and YoY.

In the YoY section for a particular period, namely 24nd of February until 2nd of March for the metric Umsatz (brutto) Looker Studio calculates an inrease of 0.9% while the true answer is 39,84%.

Does anyone know how to solve this?

Thanks in advance!