/etc/ipsec/user/conf overwritten?

I have a system on which I had included some arguments in /etc/ipsec.user.conf, as outlined in the wiki here:

https://wiki.ipfire.org/configuration/services/ipsec/example_configuration-_...

I might have removed these myself, but I am fairly certain I did not, and I looked at the file today and noticed that it was empty. My suspicion is that a core update overwrote the file, which it shouldn't, and I am wondering if anyone can confirm my suspicion and what can be done to avoid that in the future if it is indeed what happened.

Any thoughts?

Tom