Invisible synergies with mage as well

There is the woodland bug where some of the synergy values of your woodland group seem to all be stored on the same champion allowing one or two woodlands to have more than 1 druid/woodland. The same bug is possible with mages, I was able to take syndra out of a 6 mage comp and keep 6 mage yesterday. Wasn't sure if it was known for other champions.