The Chosen Ones

Found a bug that exist because of tera ring. At chapter 8, all my character were lvl 85, it means I started chapter 9 with a 5 lvl higher than the limite of 80. Problem is that when I reach a new lvl on chapter 9 without tera ring, my characters drops directly to lvl 80. It wouldn't be that annoying if I wasn't losing 5 spell lvl instead of 2 only (2 on Q, 1 on W and 2 on R), I guess I'm losing one spell lvl for each lvl lost (instead of one every 2 lvl).

I'm not sure if this bug is only for chapter 9 or all, I didn't have this problem because of chapter 7 and 8 I was switching the ring, but now it's not possible because you are playing them one by one.

Another bug with this ring is that when you do one lvl with tera ring, you don't need to wear it to be able to reach max lvl + 15.