I have also spotted this issue on ADT with focal/linux 5.4.0-44.48 on arm64:
https://objectstorage.prodstack4-5.canonical.com/v1/AUTH_77e2ada1e7a84929a74ba3b87153c0ac/autopkgtest-focal/focal/arm64/l/linux/20200820_140135_b0298@/log.gz
It didn't fail on the other arches though.
I have also spotted this issue on ADT with focal/linux 5.4.0-44.48 on arm64:
https:/ /objectstorage. prodstack4- 5.canonical. com/v1/ AUTH_77e2ada1e7 a84929a74ba3b87 153c0ac/ autopkgtest- focal/focal/ arm64/l/ linux/20200820_ 140135_ b0298@/ log.gz
It didn't fail on the other arches though.