open 3.1 files in 3.5 - Player labels

Hello, I opened an orchestra score (created under 3.1) in the new Dorico version 3.5.
I like the new slur design, the score looks more relaxed somehow.
I noticed that all my Player labels (mostly with “hidden” property) do still exist, but don’t have any effect. All Player labels are visible. If I select a Player label, switch the property once to visible and back to invisible, everything is fine again. It seems to be a little glitch, just thought I should mention it.