Envelope2's Decay become 0 when I move to other MIDI tracks

OS: Win
DAW: Studio One 5

Video:Vital Envelope2's Decay Bug Report - YouTube

As you can see in the clip, ONLY Envelope2’s Decay gets 0 when I select MIDI tracks.
Would you tell me how to fix it?

(Not showing in the video, Envelope3’s Decay was normal.)