Just shut down again. I am starting to suspect this is something in Adobe causing this. This time, I opened Illustrator CC2020, when to the application menu to choose another workspace and got the spinning beachball followed by shutdown. This is the message I got on restart:
panic(cpu 11 caller 0xffffff801c25fda9): "XCPM lock timeout, cpu: 11, lock: 0xffffff801cbf4580, lock value: 0xffff0001, deadline: 0x5d24ee9cdea, current: 0x5d24ee9cdf2, timeout: 0x188683ce, contender: 0xffff0001, sniffs: 0x53c2c1, CAScount: 0x0"@/AppleInternal/BuildRoot/Library/Caches/com.apple.xbs/Sources/xnu/xnu-6153.121.2/osfmk/x86_64/xcpm/xcpm_internal.h:305
Backtrace (CPU 11), Frame : Return Address
0xffffff83c8a437b0 : 0xffffff801c11f5cd
0xffffff83c8a43800 : 0xffffff801c258b05
0xffffff83c8a43840 : 0xffffff801c24a68e
0xffffff83c8a43890 : 0xffffff801c0c5a40
0xffffff83c8a438b0 : 0xffffff801c11ec97
0xffffff83c8a439b0 : 0xffffff801c11f087
0xffffff83c8a43a00 : 0xffffff801c8c27cc
0xffffff83c8a43a70 : 0xffffff801c25fda9
0xffffff83c8a43ad0 : 0xffffff801c26022a
0xffffff83c8a43b80 : 0xffffff801c261bc0
0xffffff83c8a43bf0 : 0xffffff801c262dcd
0xffffff83c8a43cc0 : 0xffffff801c24cd7e
0xffffff83c8a43d10 : 0xffffff801c141deb
0xffffff83c8a43d70 : 0xffffff801c14170b
0xffffff83c8a43de0 : 0xffffff801c13fc2f
0xffffff83c8a43e30 : 0xffffff801c1010f6
0xffffff83c8a43e70 : 0xffffff801c112bfe
0xffffff83c8a43f00 : 0xffffff801c230d05
0xffffff83c8a43fa0 : 0xffffff801c0c6226
BSD process name corresponding to current thread: Adobe CEF Helper
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev
Mac OS version:
19F101
Kernel version:
Darwin Kernel Version 19.5.0: Tue May 26 20:41:44 PDT 2020; root:xnu-6153.121.2~2/RELEASE_X86_64
Kernel UUID: 54F1A78D-6F41-32BD-BFED-4381F9F6E2EF
Kernel slide: 0x000000001be00000
Kernel text base: 0xffffff801c000000
__HIB text base: 0xffffff801bf00000
System model name: MacPro7,1 (Mac-27AD2F918AE68F61)
System shutdown begun: NO
System uptime in nanoseconds: 31616923778546
last loaded kext at 67570091546: com.getdropbox.dropbox.kext 1.11.1 (addr 0xffffff7fa3271000, size 49152)
loaded kexts:
com.getdropbox.dropbox.kext 1.11.1
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