These bug reports are most appreciated; we fully expected to run into corner case issues like this.
The team working on Rust coreutils have been loving the feedback wider testing provides, and I am sure that 25.10's wide usage will enable Ubuntu 26.04 LTS to be confident in the new stack. It will also enable other distros to consider making the same change.
Your free personal Ubuntu Pro subscription does in fact cover as many VMs and containers as you can run on up to five personal machines, as the OP well knows. I like that we make Ubuntu Pro, including universe updates, free for anyone running at small scale.
The team working on Rust coreutils have been loving the feedback wider testing provides, and I am sure that 25.10's wide usage will enable Ubuntu 26.04 LTS to be confident in the new stack. It will also enable other distros to consider making the same change.