Serious bug that gem level doesn't be applied

Awakened added lightning damage support grants gem level, especially at 10 level of this support gem, +2 level to supported gem.

BUT in game, +2 level to supported gem doesn't applied now.

10 level Gem status exactly shows '+2 to supported lightning gem', but If I set up the gem, only 1 level elevated.

This is very serious bug, please check and solve.