Sync problem modifying the GUI event when auto-sync? is false

[GiuseppeChillemi]

I want to create a GUI which enlarges laterally on the press of a button, as do some task bars and then hide. This is a test script and I am encountering a problems: visible trails and flickering, when resizing even with auto-sync?: false and manual syncing. Click "enlarge" multiple time to test it, you will see the phantom of redrawing at each change

system/view/auto-sync?: off
enlargement: 100

view l: layout [
    p: panel 80x150 [
        Below
        Button "UltraEdit" 60x50 [
        ]       
        pad 0x20
        button "Enlarge" [
            case [
                face/extra = none [
                    l/offset/x: l/offset/x - enlargement
                    l/size/x: l/size/x + enlargement
                    p/offset/x: p/offset/x + enlargement 
                    face/extra: 'enlarged
                    show l
                    show p
                ]
                face/extra = 'enlarged [
                    l/offset/x: l/offset/x + enlargement
                    l/size/x: l/size/x - enlargement
                    p/offset/x: p/offset/x - enlargement
                    face/extra: none
                    show l      
                    show p
                ]

            ]

        ]           
    ]
]

I expected that all drawing are done after showing the panel but it seems it happens after that, redrawing the with the previous values and then with the new one. Hiiamboris thinks that internally offset and size are updated in two separate moments.

Discussion started here:

https://matrix.to/#/!ARPBrpwJJYziTJYuJj:gitter.im/$636aa6uwb0a4_GHPCvgomMqed1JydlRUQYtTe4qDQ20?via=gitter.im&via=matrix.org&via=tchncs.de

It would be nice to fix this beaviour to reach clean, no trails and flickering free updating

[ldci]

An error in your code: shop p must be replaced by show p

[GiuseppeChillemi]

An error in your code: shop p must be replaced by show p

Fixed, thanks