Affects Version/s: Minecraft 17w48a
Fix Version/s: Minecraft 18w01a
Environment:GPU: AMD Radeon RX 480 (driver 17.6.1)
CPU: Intel Core i5-6500
OS: Windows 10 Home x64 (latest)
Monitor 1 (running Minecraft): BenQ GW2270H (1920×1080 @ 60 Hz)
Monitor 2: Samsung SyncMaster P2470HD (1920×1080 @ 60 Hz)
Tabbing out while in fullscreen mode causes the game to lock up, unable to tab back in. The memory usage and whatnot is frozen, and the only way to close the game is to kill the process manually. No crash log can be produced from this.
Almost certainly caused by the new LWJGL version. Related to MC-121367?