Problems with launching some proton games using additional windows for installation

[Vladislavuz]

Your system information

• Steam client version: 1584730869
• SteamOS version: 2.0: 1:2.195
• Opted into Steam client beta?: Yes
• Opted into SteamOS beta?: Yes
• Have you checked for updates in Settings > System?: Yes

Please describe your issue in as much detail as possible:

During the installation process, some games ask for confirmation to install additional software. These windows do not appear on SteamOS, resulting in an endless download. Exiting this process is possible only with a button reset. Examples of games: GTA 4, Sleeping Dogs, L.A. Noire

Steps for reproducing this issue:

[Vladislavuz]

Delete the installscript.vdf file from the game directory. The game Sleeping dogs works fine in SteamOS in full-screen mode without borders and without the "white window" effect.