Links created for annotations are (sometimes) broken

I'm not sure this issue is related to this repo. Please forward to the right place, if link generation is not dealt with here.

Describe the bug
GHA provides the great feature of linking annotations shown on a build's summary page to the corresponding line in the log.
However, in this build the generated links are broken: they refer to step:16 although the build only comprises 9 steps. Replacing the step number with the correct one (step:5) fixes this.

Looks like the calculation of the step reference is broken. I wasn't able to reproduce the issue in a smaller scenario.

To Reproduce

1. Check build https://github.com/rhaschke/ros-o-builder/actions/runs/5956785236
2. The link https://github.com/rhaschke/ros-o-builder/actions/runs/5956785236/job/16168574163#step:16:5085 generated for the error bloom-generate failed for rosbuild is broken.

Expected behavior
The link should be: https://github.com/rhaschke/ros-o-builder/actions/runs/5956785236/job/16168574163#step:5:5085

Desktop (please complete the following information):
Browser: Google Chrome, version 116.0.5845.110 (Official Build

Additional context
Clicking on a line number in the log within the browser, shows the correct link in the navigation field.

Start by inspecting the linked GitHub Actions build and compare the generated annotation URL using step:16 with the expected step:5 URL. Trace the toolkit's annotation link generation from that observed discrepancy; done means the affected annotation links target the correct log step and the behavior is covered by a regression check.