HI, I see the last incidence of this was from 5 months ago, but I'm having it. I have updated my mac to the latest version (11.6) and it systematically reboots when the laptop is closed (sleeping) and I connect it to a DELL dock. Here's the report. panic(cpu 5 caller 0xffffff8000e9edf6): [kext.kalloc.2048]: element modified after free (off:1672, val:0xfffffffe00000000, sz:2048, ptr:0xffffff937a255800, prot:zero) 1672: 0xfffffffe00000000 Backtrace (CPU 5), Frame : Return Address 0xffffffa12a1929b0 : 0xffffff800068cfdd 0xffffffa12a192a00 : 0xffffff80007d3fd3 0xffffffa12a192a40 : 0xffffff80007c45ca 0xffffffa12a192a90 : 0xffffff8000631a2f 0xffffffa12a192ab0 : 0xffffff800068c7fd 0xffffffa12a192bd0 : 0xffffff800068caf3 0xffffffa12a192c40 : 0xffffff8000e9cdca 0xffffffa12a192cb0 : 0xffffff8000e9edf6 0xffffffa12a193130 : 0xffffff80006eb976 0xffffffa12a1931a0 : 0xffffff800069c5ec 0xffffffa12a1931f0 : 0xffffff8000dada32 0xffffffa12a193210 : 0xffffff800375d84c 0xffffffa12a193230 : 0xffffff800376bb08 0xffffffa12a193290 : 0xffffff800375dfd4 0xffffffa12a193330 : 0xffffff80037600a7 0xffffffa12a1935e0 : 0xffffff800375e4d9 0xffffffa12a193740 : 0xffffff8003755981 0xffffffa12a193c50 : 0xffffff8000e86af4 0xffffffa12a193ce0 : 0xffffff8000920e40 0xffffffa12a193d40 : 0xffffff8000936d56 0xffffffa12a193f40 : 0xffffff8000d3f1de 0xffffffa12a193fa0 : 0xffffff80006321f6 Kernel Extensions in backtrace: com.apple.security.sandbox(300.0)[1E5C48E7-0D4C-30DA-BFA4-C87B27353F0D]@0xffffff800374c000->0xffffff8003792fff dependency: com.apple.driver.AppleMobileFileIntegrity(1.0.5)[A994AEFE-3919-310E-A2C9-405E864BCB7B]@0xffffff8001cc0000->0xffffff8001cd5fff dependency: com.apple.iokit.IOStorageFamily(2.1)[7C0E4949-640F-3D1D-97AF-030903A22663]@0xffffff800326f000->0xffffff8003280fff dependency: com.apple.kext.AppleMatch(1.0.0d1)[EAD07327-D5B8-36D8-B3CC-DBEE8E4EE295]@0xffffff8001cbc000->0xffffff8001cbefff Process name corresponding to current thread: NotificationCenter Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev chunklist-security-epoch=0 -chunklist-no-rev2-dev Mac OS version: 20G165 Kernel version: Darwin Kernel Version 20.6.0: Mon Aug 30 06:12:21 PDT 2021; root:xnu-7195.141.6~3/RELEASE_X86_64 Kernel UUID: C2591F4E-EE82-33CC-8C59-DB81D9AD80DD KernelCache slide: 0x0000000000400000 KernelCache base: 0xffffff8000600000 Kernel slide: 0x0000000000410000 Kernel text base: 0xffffff8000610000 __HIB text base: 0xffffff8000500000 System model name: MacBookPro16,1 (Mac-E1008331FDC96864) System shutdown begun: NO Hibernation exit count: 26 System uptime in nanoseconds: 17717902905029 Last Sleep: absolute base_tsc base_nano Uptime : 0x0000101d454f11d3 Sleep : 0x0000101acfea5760 0x000009c937ae70e6 0x000010050575280f Wake : 0x0000101b01527036 0x00000a14da9d9e62 0x0000101ae0a7ca49 last started kext at 12580617391: >AGPM 122.1 (addr 0xffffff7f99da9000, size 118784) loaded kexts: AGPM 122.1 !APlatformEnabler 2.7.0d0 X86PlatformShim 1.0.0 @filesystems.autofs 3.0 @fileutil 20.036.15 AudioAUUC 1.70 !ATopCaseHIDEventDriver 4050.1 !AHIDALSService 1 @kext.AMDRadeonX6000 4.0.6 @kext.AMDRadeonServiceManager 4.0.6 !AGraphicsDevicePolicy 6.3.5 !AUpstreamUserClient 3.6.8 @AGDCPluginDisplayMetrics 6.3.5 pmtelemetry 1 |IOUserEthernet 1.0.1 !ABridgeAudio!C 140.4 !AFIVRDriver 4.1.0 ACPI_SMC_PlatformPlugin 1.0.0 usb.!UUserHCI 1 BridgeAudioCommunication 140.4 !AGFXHDA 100.1.433 !AAVEBridge 6.1 !AThunderboltIP 4.0.3 !A!IKBLGraphics 16.0.5 |IO!BSerialManager 8.0.5d7 @Dont_Steal_Mac_OS_X 7.0.0 !AHV 1 !ADiskImages2 1 !AMuxControl2 6.3.5 !AWWANSupport1 4.0.0 !A!ICFLGraphicsFramebuffer 16.0.5 !A!IPCHPMC 2.0.1 AGDCBacklightControl 6.3.5 !ABacklight 180.3 !AMCCSControl 1.14 !A!ISlowAdaptiveClocking 4.0.0 !AWWANSupport 4.0.0 usb.realtek8153patcher 5.0.0 BCMWLANFirmware4378.Hashstore 1 BCMWLANFirmware4377.Hashstore 1 BCMWLANFirmware4364.Hashstore 1 BCMWLANFirmware4355.Hashstore 1 !AFileSystemDriver 3.0.1 @filesystems.tmpfs 1 @filesystems.hfs.kext 556.100.11 @BootCache 40 @!AFSCompression.!AFSCompressionTypeZlib 1.0.0 @!AFSCompression.!AFSCompressionTypeDataless 1.0.0d1 !ABCMWLANBusInterfacePCIeMac 1 @filesystems.apfs 1677.141.2 @private.KextAudit 1.0 !ASmartBatteryManager 161.0.0 !AACPIButtons 6.1 !ASMBIOS 2.1 !AACPIEC 6.1 !AAPIC 1.7 @!ASystemPolicy 2.0.0 @nke.applicationfirewall 311 |IOKitRegistryCompatibility 1 |EndpointSecurity 1 @kext.triggers 1.0 !AHIDKeyboard 224 !AActuatorDriver 4440.3 !AMultitouchDriver 4440.3 !AInputDeviceSupport 4400.35 !AHS!BDriver 4050.1 IO!BHIDDriver 8.0.5d7 @kext.AMDRadeonX6100HWLibs 1.0 @kext.AMDRadeonX6000HWServices 4.0.6 IOPlatformPluginLegacy 1.0.0 X86PlatformPlugin 1.0.0 usb.cdc.acm 5.0.0 usb.serial 6.0.0 |IO!BHost!CUARTTransport 8.0.5d7 |IO!BHost!CTransport 8.0.5d7 @kext.AMDRadeonX6000Framebuffer 4.0.6 @kext.AMDSupport 4.0.6 !AHDA!C 283.15 |IOHDA!F 283.15 !AThunderboltEDMSink 5.0.3 |IOAVB!F 940.4 |IOEthernetAVB!C 1.1.0 !AGraphicsControl 6.3.5 |IOAccelerator!F2 442.9 IOPlatformPlugin!F 6.0.0d8 @!AGPUWrangler 6.3.5 @!AGraphicsDeviceControl 6.3.5 !ABacklightExpert 1.1.0 |IONDRVSupport 585.1 |IOGraphics!F 585.1 !ASMBus!C 1.0.18d1 @plugin.IOgPTPPlugin 985.2 !UAudio 405.39 |IOAudio!F 300.6.1 @vecLib.kext 1.2.0 !ASMBusPCI 1.0.14d1 !A!ILpssUARTv1 3.0.60 !A!ILpssUARTCommon 3.0.60 !AOnboardSerial 1.0