I have had the same problem on Big Sur using a Dell WD19TB Thunderbolt Docking Station. 1584: 0x0000210100000000 1592: 0x0000000b00005400 1600: 0x0000000000000009 1608: 0x0000020300000100 1616: 0x0000015400000154 1624: 0x0000000100000a00 1632: 0x000008340000041a 1640: 0x0000000000001400 Backtrace (CPU 10), Frame : Return Address 0xffffffa0d3562cf0 : 0xffffff8009a8e0dd 0xffffffa0d3562d40 : 0xffffff8009bd4f33 0xffffffa0d3562d80 : 0xffffff8009bc552a 0xffffffa0d3562dd0 : 0xffffff8009a32a2f 0xffffffa0d3562df0 : 0xffffff8009a8d8fd 0xffffffa0d3562f10 : 0xffffff8009a8dbf3 0xffffffa0d3562f80 : 0xffffff800a29d81a 0xffffffa0d3562ff0 : 0xffffff800a29f846 0xffffffa0d3563470 : 0xffffff8009aecad6 0xffffffa0d35634e0 : 0xffffff8009a9d6bc 0xffffffa0d3563530 : 0xffffff800a1ae4f2 0xffffffa0d3563550 : 0xffffff7fa3ef8fce 0xffffffa0d3563600 : 0xffffff7fa3ef965e 0xffffffa0d3563640 : 0xffffff7fa3eb9d86 0xffffffa0d3563660 : 0xffffff7fa47f3e78 0xffffffa0d3563900 : 0xffffff7fa3eba924 0xffffffa0d3563930 : 0xffffff7fa47f5074 0xffffffa0d35639c0 : 0xffffff7fa47f30f7 0xffffffa0d3563a10 : 0xffffff7fa47f2ee7 0xffffffa0d3563a60 : 0xffffff7fa47f1f99 0xffffffa0d3563aa0 : 0xffffff800a21e13e 0xffffffa0d3563af0 : 0xffffff7fa3eba5e2 0xffffffa0d3563b20 : 0xffffff800a22837b 0xffffffa0d3563c80 : 0xffffff8009b80961 0xffffffa0d3563d90 : 0xffffff8009a9375d 0xffffffa0d3563e00 : 0xffffff8009a69cf5 0xffffffa0d3563e60 : 0xffffff8009a81312 0xffffffa0d3563ef0 : 0xffffff8009ba982d 0xffffffa0d3563fa0 : 0xffffff8009a33216 Kernel Extensions in backtrace: com.apple.iokit.IOAcceleratorFamily2(442.9)[BDA1401D-563F-3650-B616-C8073E90475B]@0xffffff7fa47ae000->0xffffff7fa4818fff dependency: com.apple.driver.AppleMobileFileIntegrity(1.0.5)[366C7BD4-9502-3D1C-ABBE-DE9749913D0C]@0xffffff800b0c0000->0xffffff800b0d5fff dependency: com.apple.iokit.IOGraphicsFamily(585.1)[2C81B74F-C771-3643-82EC-12CD4AC5EFDB]@0xffffff7fa492f000->0xffffff7fa495dfff dependency: com.apple.iokit.IOPCIFamily(2.9)[99A70889-A31C-3B25-8E88-ADD3F317E4E4]@0xffffff800c56a000->0xffffff800c592fff dependency: com.apple.iokit.IOReportFamily(47)[367CCAE7-DAB4-3424-B191-44044619D5CB]@0xffffff800c5a1000->0xffffff800c5a3fff dependency: com.apple.iokit.IOSurface(290.8.1)[8FA218E4-361C-3C8B-94F0-48434AA535A0]@0xffffff800c694000->0xffffff800c6b0fff com.apple.driver.AppleIntelKBLGraphics(16.0.4)[F7BCF586-AF08-3277-9C66-04F439E684B4]@0xffffff7fa3ea3000->0xffffff7fa3f5afff dependency: com.apple.iokit.IOAcceleratorFamily2(442.9)[BDA1401D-563F-3650-B616-C8073E90475B]@0xffffff7fa47ae000->0xffffff7fa4818fff dependency: com.apple.iokit.IOGraphicsFamily(585.1)[2C81B74F-C771-3643-82EC-12CD4AC5EFDB]@0xffffff7fa492f000->0xffffff7fa495dfff dependency: com.apple.iokit.IOPCIFamily(2.9)[99A70889-A31C-3B25-8E88-ADD3F317E4E4]@0xffffff800c56a000->0xffffff800c592fff dependency: com.apple.iokit.IOSurface(290.8.1)[8FA218E4-361C-3C8B-94F0-48434AA535A0]@0xffffff800c694000->0xffffff800c6b0fff Process name corresponding to current thread: TouchBarServer Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev chunklist-security-epoch=0 -chunklist-no-rev2-dev Mac OS version: 20F71 Kernel version: Darwin Kernel Version 20.5.0: Sat May 8 05:10:33 PDT 2021; root:xnu-7195.121.3~9/RELEASE_X86_64 Kernel UUID: 52A1E876-863E-38E3-AC80-09BBAB13B752 KernelCache slide: 0x0000000009800000 KernelCache base: 0xffffff8009a00000 Kernel slide: 0x0000000009810000 Kernel text base: 0xffffff8009a10000 __HIB text base: 0xffffff8009900000 System model name: MacBookPro16,1 (Mac-E1008331FDC96864) System shutdown begun: NO Hibernation exit count: 12 System uptime in nanoseconds: 44120622946291 Last Sleep: absolute base_tsc base_nano Uptime : 0x00002820a20edafc Sleep : 0x0000281a9b5f8e9a 0x0000000201beb7d4 0x0000280af830fca7 Wake : 0x0000281abf2d9789 0x0000000200a50fbc 0x0000281aaa3beba3 last started kext at 14175647796: >AGPM 122.1 (addr 0xffffff7fa31a3000, size 118784) loaded kexts: