Mastery upgrading bug.

So this bug has been with me for quite some time, think I first noticed it when I got M6/7 on Eve, when I put the tokens together, they just disappear and I'm still on the mastery I was getting out of. Only way to fix it is to re-log so it updates my shit, I don't know why it happens, but it seems to everytime I get M6/7 on someone, it's not fatal, but it does happen and it's really annyoing.