3 Star Evolution in Plankerton

I'm in Plankerton right now (but very close to beating it), and just realise I can upgrade schematics, heroes etc.. to 3 stars now? Even tho if you are in plankton you can only evolve up to two stars.

And you can check as well, the only way to be able to upgrade to 3 stars you have to have completed canny storm shield 1 even tho I'm like 6 missions behind that.

Probably the strangest bug I've witnessed.