DWA bug in Domino 8.5

I think I found a bug in the just released domino 8.5 (maybe i’m wrong). When you open webmail using the 8.5 mail template. Mail, calendar and contact will be opend in tabs. When closing the mail tab there is no icon to reopen mail again

Subject: different results on two servers

I migrated two servers…both servers show different result. The second server i’ve upgraded does show the mail icon…still try to find out why the other server does not show the mail icon.