On renkulab.io, I can switch between branches but the commits don’t change. They remain the ones from master.
https://renkulab.io/projects/gasserli/raw-data-preprocessing/environments/new
You are right. This is a bug that was introduced in the latest version, sorry!
We will fix this ASAP. https://github.com/SwissDataScienceCenter/renku-ui/issues/967
For the moment, to work around this problem, launch an environment on master and then, once in the environment, do a git checkout <branch name> to switch to the branch you want.
Do not select in the UI and launch an environment against it. If you do that, the git commit history will be confusing and wrong. If that happens, then do a git reset --hard origin/<branch name> to fix the situation.