Talk:Aircraft Proficiency/@comment-26345301-20160204115904

I have a Zuikaku level 64 equipped with Reppu, Type 99 Dive Bomber Egusa Squadron, Tenzan 601 Air Group, and Tenzan Model 12 Murata Squadron all on max proficiency levels.

I only use her on PvP but I wanted to rush level my Bismarck so I used her in 3-2-A. After the first run, I noticed that all of the planes have their proficiency levels dropped from max to just level 1 or 2. After a few more runs, the lost their proficiency levels...

Any explanation for this?