Though Shakespare will do the same when I give him a bit of Bond EXP as well, almost Bond Level 8 there. Still, first of my bronze servants to get far enough to go from apples to SQ.
I generally cycle backline servants, everyone in bronze tier is currently minimum Bond 6, with some already Bond 7. There was just a bonus bond and raid that pushed her and Shakespeare ahead.
So someday I'll have a topic with a couple of dozen Bond 10 servants in the same week. :P
Mine had a lot of wasted EXP, back before I even knew about Bond CEs or the benefits of Bond levels. I used to have 3 or 4 slots filled to take only servants I wanted to use, like my always useful Lancer Artoria Alter.