Double tap sets "Default" velocity half and again and again

Hi I just get the beautiful machine and am into it but I can’t fix problem, anyone has same issue or have solution? I might miss something in manual though…

I think
1st normal puts note with velocity=100
1st double puts note with velocity=50
2nd normal tap puts note with velocity=100
is right move but

My pyramid goes like
1st normal puts note with velocity=100
1st double puts note with velocity=50
2nd normal tap puts note with velocity=50
2nd double puts note with velocity=25
3rd normal tap puts note with velocity=25
3rd double puts note with velocity=12
Continue like 6>3>0

I tried new OS and powe on/off and several settings change but this is happening 1 of 3 times I make new project(yeah its weird…)

I’m very happy if anyone could help me…

Go into settings>misc, and you can decide what you want the double-tap to do.

Thanks for reply. I set double tap mode to Velocity but this is happening…

I don’t get this behavior, however when I enter a note in the step mode and then press and hold the step pad to see the attributes of the note and then release the pad, the velocity setting changes itself to the velocity of the note I was inspecting (this also happens with the note number, but not with note width and offset)

Yeah this is weird… I took two video one is normal and one is error one.
https://drive.google.com/open?id=19e0-Jr_ESVwh-SQhRQ1n6fNEif4v8WAr