Thinos 9.1 Windows RDP - Shift + Down not working

The effect is it's reduce the RDP Windows session and not  extand the selection for exemple in Excel.

Wyse ThinOS (9.1.1131)

Microsoft_WVD_1.0_1060.pkg-V1.0.1060

Platform 3040 and 5470 AIO

For information it's work with Citrix_Workspace_App_20.12.0.12_1.pkg-V20.12.0.12.1