I got the same issue with my two archlinux configs (laptop and desktop).

Here are my system informations.

Computer Information:
    Manufacturer:  Unknown
    Model:  Unknown
    Form Factor: Laptop
    No Touch Input Detected

Processor Information:
    CPU Vendor:  GenuineIntel
    CPU Family:  0x6
    CPU Model:  0x45
    CPU Stepping:  0x1
    CPU Type:  0x0
    Speed:  3300 Mhz
    4 logical processors
    2 physical processors
    HyperThreading:  Supported
    FCMOV:  Supported
    SSE2:  Supported
    SSE3:  Supported
    SSSE3:  Supported
    SSE4a:  Unsupported
    SSE41:  Supported
    SSE42:  Supported
    AES:  Supported
    AVX:  Supported
    CMPXCHG16B:  Supported
    LAHF/SAHF:  Supported
    PrefetchW:  Unsupported

Network Information:
    Network Speed:  

Operating System Version:
    Linux (64 bit)
    Kernel Name:  Linux
    Kernel Version:  4.6.2-1-ARCH
    X Server Vendor:  The X.Org Foundation
    X Server Release:  11803000
    X Window Manager:  GNOME Shell
    Steam Runtime Version:  steam-runtime-release_2016-02-23

Video Card:
    Driver:  Intel Open Source Technology Center Mesa DRI Intel(R) Haswell Mobile x86/MMX/SSE2

    Driver Version:  3.0 Mesa 11.2.2
    OpenGL Version: 3.0
    Desktop Color Depth: 24 bits per pixel
    Monitor Refresh Rate: 60 Hz
    VendorID:  0x1002
    DeviceID:  0x6601
    Revision Not Detected
    Number of Monitors:  1
    Number of Logical Video Cards:  2
    Primary Display Resolution:  1920 x 1080
    Desktop Resolution: 1920 x 1080
    Primary Display Size: 12,17" x 6,89"  (13,98" diag)
                                            30,9cm x 17,5cm  (35,5cm diag)
    Primary VRAM Not Detected

Sound card:
    Audio device: IDT 92HD91BXX

Memory:
    RAM:  15949 Mb

Miscellaneous:
    UI Language:  English
    LANG:  fr_FR.utf8
    Microphone:  Not set
    Total Hard Disk Space Available:  346457 Mb
    Largest Free Hard Disk Block:  59797 Mb
    VR Headset: None detected

I've got this issue too on a laptop on my current Arch Linux installation and I remember having it on the previous installation also.
GNOME 3.20 DE

Same issue as well with Ubuntu 14.04

This issue is not fixed or has come up again in 16.04.1.

Same issue with Openbox and Steam version 1474415843

Happening on Arch Linux using Gnome on the latest Steam beta.

I can confirm this is still happening for me too on Arch with Gnome - and it has been happening for a looong time. I've been using BP regularly for about a year now but I used it before as well (rarely) and the bug was there even then.

It is very annoying when using a controller.

Why hasn't this issue been reopened yet?

@HoratiuMl The even more annoying part is this even happens when using the Steam Link. (Granted the mouse controls of the Steam controller make it a bit easier to get back to it)

Also there is a currently open issue https://github.com/ValveSoftware/steam-for-linux/issues/4611

@parkerlreed Thanks for the link to the open issue. Gonna post my full comment there.
Wow, I didn't expect it to happen to the Steam Link as well. This is really bad. Unfortunately I don't have one so I cannot try it. I wouldn't have a need for it personally since I don't have a TV anyway.

I'm not sure when or what update but Big Picture is correctly coming into focus after exiting games now. Using both the exit menu in the overlay and exiting a game from its own menu.

EDIT: Interesting! It only works if I have the desktop friends window open. Otherwise it's the same old behavior.

EDIT2: Ok it's just sporadic. It did it like 5 times in a row with the friends window open but as soon as I go to record it BPM loses focus even with friends open.

Having the same issue. Noticed it while streaming games from my Windows box to my Fedora system. It's annoying because I launch Steam in Big Picture mode through an SSH session, but whenever I exit a game, I need to VNC and remaximize Steam again.

@wright3189 you can use these scripts to avoid using VNC:

https://gist.github.com/mattbell87/243caa6465e093680b76
https://gist.github.com/mattbell87/5174570e0d34c0ccba68

Save them to /usr/local/bin and chmod +x

For anyone replying please go to the open issue.

#4611