Changing fullscreen state on Big Sur beta causes appkit crash

[jdngray77]

Appears only to be upon exiting exclusive fullscreen.

2022-02-15 12:39:17.821 java[2407:33627] *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'NSWindow drag regions should only be invalidated on the Main Thread!'
*** First throw call stack:
(
	0   CoreFoundation                      0x00007fff205315bf __exceptionPreprocess + 242
	1   libobjc.A.dylib                     0x00007fff20269bbb objc_exception_throw + 48
	2   CoreFoundation                      0x00007fff20559dae -[NSException raise] + 9
	3   AppKit                              0x00007fff22c06872 -[NSWindow(NSWindow_Theme) _postWindowNeedsToResetDragMarginsUnlessPostingDisabled] + 321
	4   AppKit                              0x00007fff22c2ebe3 -[NSThemeFrame setStyleMask:] + 142
	5   AppKit                              0x00007fff22c2e986 __25-[NSWindow setStyleMask:]_block_invoke + 2065
	6   AppKit                              0x00007fff22c2e11b NSPerformVisuallyAtomicChange + 132
	7   AppKit                              0x00007fff22c2e028 -[NSWindow setStyleMask:] + 170
	8   liblwjgl.dylib                      0x0000000128839cca Java_org_lwjgl_opengl_MacOSXDisplay_nSetResizable + 90
	9   ???                                 0x000000010ebfd407 0x0 + 4542419975
	10  ???                                 0x000000010ebecffd 0x0 + 4542353405
)
libc++abi: terminating with uncaught exception of type NSException