[iMac] Bootcamp window/OSX 藍芽KEYBOARD斷線問題

想請問用Bootcamp 設換 window/OSX 時, 藍芽KEYBOARD係唔係一定會斷線?
我記得之前無依個問題, 升級完OSX之後就變成咁,
依家每次轉WINDOW 或OSX都要SET 過藍芽KEYBOARD好唔方便