Editing Issue of TMS FNC Grid on TMS WEB Core

WEB TMS WEB Core
1

When I push up/down button after edited some characters on TMS FNC Grid in TMS Web Core Env,
the edited values are copied dest col from origin col.
Please check it.
Refer below url link for detail infor.
https://3by9r0.axshare.com

2

We cannot reproduce this here, please provide a simple example.