As can be seen in the autopkgtests of circlator [1] and spades [2], this started happening again with the upload of python3-defaults 3.9.0-3, which switched the default Python version from 3.8 to 3.9.
It can also be seen that the autopkgtests of both circlator and spades previously started passing again on 2020-04-08, as soon as python3-defaults 3.8.2-3 was uploaded, removing Python 3.7 as a supported version. [1] https://ci.debian.net/packages/c/circlator/testing/amd64/ [2] https://ci.debian.net/packages/s/spades/testing/amd64/
