I forgot to mention that the same happens with the notification for turning volume or brightness up and down. If I turn the volume up for example, the game freezes almost every time the level notification disappears.
System: Host: satellite Kernel: 4.4.0-36-generic x86_64 (64 bit) Desktop: MATE 1.12.1 Distro: Ubuntu 16.04 xenial Machine: System: ASUSTeK (portable) product: X551CAP v: 1.0 Mobo: ASUSTeK model: X551CAP v: 1.0 Bios: American Megatrends v: X551CAP.210 date: 06/04/2014 CPU: Dual core Intel Celeron 1007U (-MCP-) speed/max: 800/1500 MHz Graphics: Card: Intel 3rd Gen Core processor Graphics Controller Display Server: X.Org 1.18.3 drivers: intel (unloaded: fbdev,vesa) Resolution: [email protected] GLX Renderer: Mesa DRI Intel Ivybridge Mobile GLX Version: 3.0 Mesa 11.2.0 Network: Card-1: Qualcomm Atheros AR9485 Wireless Network Adapter driver: ath9k Card-2: Realtek RTL8101/2/6E PCI Express Fast/Gigabit Ethernet controller driver: r8169 Drives: HDD Total Size: 40.0GB (80.9% used) Info: Processes: 181 Uptime: 6 min Memory: 959.0/3710.0MB Client: Shell (bash) inxi: 2.2.35 aces