KK does not maintain this plugin anymore. Moving to unassigned to set the expectation
Duplicate of JENKINS-45295.
Can you try using -disableClientsUniqueId as a temporary workaround?
Fixed in #110 and will be released in 3.17.
Released in 3.17.
Thanks Basil Crow! I am in fact using -disableClientsUniqueId, but I must not have been when I tested this behavior back in 2017. I just tested and reloading the file works correctly even in 3.15 with that switch, as you pointed out in the PR.