laurker Your system will keep the previous kernel around for a while for you to continue to boot into. Eventually though it'll get cleaned up, it's highly advised that you let us know about such regressions so we can track them and make sure they're fixed.
I will note though that we're going to transition our build for the current kernel to the LTS, so there will be a multi-week period where we will have a big "LTS users please test the current kernel to make sure it works for you" announcement on the forum (probably also a blog post) where we will hope that LTS users will chime in with any issues.