I have the same recurring problem as well. About 1 to 2 times per week will get a kernel panic. This happens on wake from sleep. Mac OS 11.5.1. MacBook Pro 16 inch 2019. System Firmware Version: 1554.140.20.0.0 (iBridge: 18.16.14759.0.1,0) Using a WAVLINK Thunderbolt 3 Display Docking station. Model UTD21 REV B. I power the laptop from that docking station through the USB-C port and have 2x 4k LG monitors connected on the rear of that using Display port. panic(cpu 3 caller 0xffffff800929fc36): [kext.kalloc.2048]: element modified after free (off:1584, val:0x0000210100000000, sz:2048, ptr:0xffffff93ce3b3000, prot:zero) 1584: 0x0000210100000000 1592: 0x0000000b00005400 1600: 0x0000000000000009 1608: 0x0000020300000100 1616: 0x0000015400000154 1624: 0x0000001000000a00 1632: 0x000008340000041a 1640: 0x0000000000001400 Backtrace (CPU 3), Frame : Return Address 0xffffffa1be712d00 : 0xffffff8008a8e04d 0xffffffa1be712d50 : 0xffffff8008bd4e13 0xffffffa1be712d90 : 0xffffff8008bc540a 0xffffffa1be712de0 : 0xffffff8008a32a2f 0xffffffa1be712e00 : 0xffffff8008a8d86d 0xffffffa1be712f20 : 0xffffff8008a8db63 0xffffffa1be712f90 : 0xffffff800929dc0a 0xffffffa1be713000 : 0xffffff800929fc36 0xffffffa1be713480 : 0xffffff8008aec9e6 0xffffffa1be7134f0 : 0xffffff8008a9d65c 0xffffffa1be713540 : 0xffffff80091ae872 0xffffffa1be713560 : 0xffffff800bb5d944 0xffffffa1be713580 : 0xffffff800bb6bb08 0xffffffa1be7135e0 : 0xffffff800bb5e096 0xffffffa1be713680 : 0xffffff800bb6020f 0xffffffa1be713930 : 0xffffff800bb5e59b 0xffffffa1be713a90 : 0xffffff800bb5389f 0xffffffa1be713af0 : 0xffffff800bb583b0 0xffffffa1be713cb0 : 0xffffff800928575e 0xffffffa1be713d00 : 0xffffff8008d487af 0xffffffa1be713e10 : 0xffffff8008d3dd41 0xffffffa1be713f40 : 0xffffff800914001e 0xffffffa1be713fa0 : 0xffffff8008a331f6 Kernel Extensions in backtrace: com.apple.security.sandbox(300.0)[305D7379-15AF-36C7-A23A-F8E16A52132C]@0xffffff800bb4c000->0xffffff800bb92fff dependency: com.apple.driver.AppleMobileFileIntegrity(1.0.5)[152D7047-0D43-3CA8-B1EA-251D3F80AC28]@0xffffff800a0c0000->0xffffff800a0d5fff dependency: com.apple.iokit.IOStorageFamily(2.1)[6CD2A6EC-9FFC-370D-8FEE-C8016E5C6BBA]@0xffffff800b66f000->0xffffff800b680fff dependency: com.apple.kext.AppleMatch(1.0.0d1)[B81FB839-709B-3BF8-87E6-640E9505A162]@0xffffff800a0bc000->0xffffff800a0befff Process name corresponding to current thread: installd Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev Mac OS version: 20G80 Kernel version: Darwin Kernel Version 20.6.0: Wed Jun 23 00:26:31 PDT 2021; root:xnu-7195.141.2~5/RELEASE_X86_64