Mentioned in the Unstable Updates announcement thread:
It might be worthwhile applying the suggested temporary workaround and/or watching that topic (and possibly the Testing announcement thread as well) for any updates on the issue, in case it’s related.
Otherwise, I wonder if you have performed an update recently?
As @bananamangodog mentions, kernel 7.0 is now in all branches – perhaps you only need to apply the latest Stable update, which was made available a few days ago.