Hi, thanks for sharing this issue.
Another user has also reported this problem. v3.19 contained some refactoring around the code analysis suppression that shouldn't have resulted in a functional change, but apparently in some environments it has. I haven't yet been able to reproduce this problem.
I'm wondering if you could try adding a
Custom build property of 'RunCodeAnalysis' = 'False' on each of the projects involved. Can you confirm if this suppresses the issue?