MKR ENV reporting negative values

I have an MKR ENV shield paired with a MKR 1300 controller. When exposed to bright sun light (above 1650 lx) it begins reporting negative values for humidity, uva and uvb. Under low light conditions (below 1650 lx) it works fine. I have replaced both the MKR 1300 controller and ENV shield but got the same results. I am using the Ardunio IDE version 1.8.12 running under Windows 10. Has anyone else experienced issues with the shield?