This is certainly not just affecting interim releases. Ubuntu 26.04.1 has been released but is currently held back from do-release-upgrade for the LTS channel (which IIRC is unusual for a LTS's .1 release) due to rust-coreutils issue:

> Users of Ubuntu 24.04 LTS will be offered an automatic upgrade to 26.04.1 LTS via Update Manager a couple of weeks following this release after some planned backports to address regressions in a recent version of rust-coreutils.

https://discourse.ubuntu.com/t/ubuntu-26-04-1-lts-released/8...