v18 Minecraft stürzt ab

hallo Leute mein minecraft stürzt nach c.a 3 Minuten ab folgender fehler kommt

Code:

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[20:34:58] [Thread-6/ERROR]: Error in class 'LibraryLWJGLOpenAL'

[20:34:58] [Thread-6/ERROR]: Source '63a5fa34-1208-4b70-8fc5-146c5adc80b3' not found in method 'play'

[20:34:58] [Thread-6/ERROR]: Error in class 'LibraryLWJGLOpenAL'

[20:34:58] [Thread-6/ERROR]: Source 'b5f4356c-0f76-4feb-bda2-b954f5fd2392' not found in method 'play'

[20:34:58] [Thread-6/ERROR]: Error in class 'LibraryLWJGLOpenAL'

[20:34:58] [Thread-6/ERROR]: Source '63a5fa34-1208-4b70-8fc5-146c5adc80b3' not found in method 'play'

[20:34:58] [Thread-6/ERROR]: Error in class 'LibraryLWJGLOpenAL'

[20:34:58] [Thread-6/ERROR]: Source 'b5f4356c-0f76-4feb-bda2-b954f5fd2392' not found in method 'play'

AL lib: (EE) alc_cleanup: 1 device not closed

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v18 Minecraft stürzt ab