【&group=】 Differences in the behaviour of deeplink parameters

I found out about this wonderful DeepLink parameter in the community article shown below.
https://www.googlecloudcommunity.com/gc/Tips-Tricks/Create-Dynamic-Links-to-Group-the-Same-Table-View-BY-ANY-COLUMN/m-p/268010

If I am not mistaken, I believe that there is currently no official documentation on this parameter.
So I am a little hesitant about whether the problem described here can be described as a ‘bug’.
But I would like to share information on this issue widely.
I have also decided to post this here because I would like to see improvements, if possible.

As shown below, this “&group=” parameter works correctly when desktop mode is OFF, but not when it is ON.

1.There are two tables as follows.

2.The following actions are created for the control table

LINKTOVIEW("Data")& "&group=" & 
ENCODEURL('[
  {"Column":"year","Order":"Ascending"},
  {"Column":"month","Order":"Ascending"}
]')

This formula has the following two-tier groupby.
-1st level: year
-2nd level: month

3.Create a simple dashboard that

4.Here is how the action behaves when desktop mode is off

マイビデオ1.gif

5.Next, here is how the action behaves when desktop mode is switched on

マイビデオ2.gif

As you can see, when desktop mode is on, the first level groupby is not executed and only the second level groupby appears to be executed.