Synergies Not Updating

Randomly, the game would not correctly display my synergies. I cannot tell if the game was still correctly giving me the buff or if it was a display problem. I had 6 blademasters using 2 blade of the ruined kings. (Jinx and Shyvana had the blade of the ruined kings). The game would show me that I only had 4 blademasters instead of 6. It would also say I didn't have gunslingers while both Jinx and Gangplank were on the field.