Comment 11 for bug 1960264

Same here. Using Jammy's 3.7.4-1build1 results in "503" errors even when downloading from main archive. Seems to happen only when used with apt in http_proxy mode (when using with localhost:3142/xxx prefix, eg, for debootstrap, that works).

Reverted to debian/3.6.4-1 from salsa and all goes back to normal.