Could you please attach the relavant part of dpkg history log a and dpkg terminal log?
It is possible, that the last run of u-u/u-m installed kernel packages triggering /etc/kernel/postinst.d/apt-auto-removal which resulted kernels to be removed in the _next_ apt/u-u/u-m run.
Could you please attach the relavant part of dpkg history log a and dpkg terminal log?
It is possible, that the last run of u-u/u-m installed kernel packages triggering /etc/kernel/ postinst. d/apt-auto- removal which resulted kernels to be removed in the _next_ apt/u-u/u-m run.