Having this recurring bug hit us from time to time is quite annoying.
Some of the older pre-engineered modules were not locked either - one could add/change the experimental at will...
5A FSDv1 and Colonia Bridge FSD were not locked initially
then they were locked,
cmdrs complained
Sally obliged to feed that sentiment to the dev team and the FSDs were "fixed" - but apparently it was a fix that didnt happen in all dev branches... And U18 seem to have been based on a such dev branch that is missing the "fix" for the said FSDs

Some of the older pre-engineered modules were not locked either - one could add/change the experimental at will...
5A FSDv1 and Colonia Bridge FSD were not locked initially
then they were locked,
cmdrs complained
Sally obliged to feed that sentiment to the dev team and the FSDs were "fixed" - but apparently it was a fix that didnt happen in all dev branches... And U18 seem to have been based on a such dev branch that is missing the "fix" for the said FSDs
