Comment 26 for bug 1865158

You could run the following scripts in shell to find out, if/when linux-generic-hwe-16.04 was purged:

grep -FH 'purge linux-generic-hwe-16.04' /var/log/dpkg.log /var/log/dpkg.log.?

for i in /var/log/dpkg.log.*.gz; do gzip -cd $i | grep --label=$i -FH 'purge linux-generic-hwe-16.04'; done

If it prints some match from time when you were using version 1.0.110-d5962da or 1.0.113-c15c34a of linux-purge, the package was probably purged by linux-purge due to a bug that is fixed in later version, see https://launchpad.net/linux-purge/+announcement/27825
Can you show the output?

P.S. As for easy updating linux-purge, see https://launchpad.net/linux-purge/+announcement/27826