Confirmed 0.2.2.0 on KSP 1.3. Fresh install with ModuleManager 2.8.1 and no other mods installed.
I'm having trouble finding the log file as instructed here so I'll provide instructions on how to reproduce. This doesn't work 100%, but you should see it after a few tries.
Launch this ship and run it on an angled trajectory until fuel runs out (seems to be more reliable if you try to make orbit, almost never duplicates the button going straight up)
Revert to launch, get extra buttons.