[Bug 59071] New: Roblox Studio flickering when resizing docked child windows on winex11 and winevulkan driver

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59071

Bug ID: 59071
           Summary: Roblox Studio flickering when resizing docked child
                    windows on winex11 and winevulkan driver
           Product: Wine
           Version: 10.20
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: trivial
          Priority: P2
         Component: winevulkan
          Assignee: [e-mail]
          Reporter: [e-mail]
      Distribution: ---

Created attachment 79856
  --> http://bugs.winehq.org/attachment.cgi?id=79856
Wine debugging log when using Studio's native Vulkan renderer

When resizing one of the docked child windows inside of Roblox Studio with its
renderer set to Vulkan (or using DXVK with the default) and while using the X11
driver, the contents of the parent window appear to flicker rapidly. This only
occurs under this combination and does not happen under WineD3D/OpenGL or
winewayland.

Steps to reproduce:

1. Create an account on roblox.com.

2. Download the installer for Roblox Studio.

3. Create a desktop entry named "Roblox_Studio.desktop" with the following
contents. Replace <user> with the name of your user.

[Desktop]
Name=Roblox Studio (modified)
Exec=env "WINEPREFIX=/home/<user>/.wine" wine
"C:\\users\\<user>\\AppData\\Roaming\\Microsoft\\Windows\\Start
Menu\\Programs\\Roblox\\Roblox Studio.lnk" %u
Type=Application
StartupNotify=true
Icon=2C11_RobloxStudioBeta.0
StartupWMClass=robloxstudiobeta.exe
MimeType=x-scheme-handler/roblox-studio-auth

4. Run the installer through Wine. This should also launch Roblox Studio itself
once the installation is complete. If not, run the RobloxStudioBeta.exe
executable that is located inside the Wineprefix.

5. Upon launching Roblox Studio, you will be greeted by an error prompting you
to login via your browser. Follow its instructions.

6. Once you reached the place templates selection, click on the "File" menu on
the top left, then on "Studio Settings" and then on "Rendering" in the newly
spawned window, where you should change the "Graphics Mode" from "Automatic" to
"Vulkan" (or just leave it as the default and copy the DXVK DLLs into the
Wineprefix). After that, relaunch Studio.

7. Load one of the place templates, then try resizing one of the docked child
windows (the "Explorer" window for instance).

System Information:
OS: Arch Linux x86_64
Kernel: Linux 6.17.9-arch1-1
Display Server: Wayland (Niri)
GPU: AMD Radeon RX 6650 XT [Discrete]
Driver: Mesa 25.2.7-1