It seems that my MacBook Pro (15" 2018) is crashing repeatedly while performing a TM Backup and downloading files in the background. Maybe the log below can tell you more.
panic(cpu 1 caller 0xfffffff00cedf7b4): x86 CPU CATERR detected
Debugger message: panic
Memory ID: 0x6
OS version: 17P4263
macOS version: 19E266
Kernel version: Darwin Kernel Version 19.4.0: Mon Mar 2 20:38:56 PST 2020; root:xnu-6153.101.6~2/RELEASE_ARM64_T8010
Kernel UUID: 3695E9D9-323E-350E-9A6E-65819BE397D7
iBoot version: iBoot-5540.105.2
secure boot?: YES
x86 EFI Boot State: 0x16
x86 System State: 0x0
x86 Power State: 0x0
x86 Shutdown Cause: 0x5
x86 Previous Power Transitions: 0x405060400
PCIeUp link state: 0x89271611
Paniclog version: 13
Kernel slide: 0x0000000004ea8000
Kernel text base: 0xfffffff00beac000
mach_absolute_time: 0x20bb0ffa65
Epoch Time: sec usec
Boot : 0x5e8634e6 0x000ba538
Sleep : 0x00000000 0x00000000
Wake : 0x00000000 0x00000000
Calendar: 0x5e864bc3 0x0008fcde
Panicked task 0xffffffe000212400: 3168 pages, 214 threads: pid 0: kernel_task
Panicked thread: 0xffffffe000530a90, backtrace: 0xffffffe015cfb4b0, tid: 349
lr: 0xfffffff00c770764 fp: 0xffffffe015cfb4f0
lr: 0xfffffff00c7705c0 fp: 0xffffffe015cfb560
lr: 0xfffffff00c88ae7c fp: 0xffffffe015cfb610
lr: 0xfffffff00cd3962c fp: 0xffffffe015cfb620
lr: 0xfffffff00c76ff28 fp: 0xffffffe015cfb990
lr: 0xfffffff00c770280 fp: 0xffffffe015cfb9e0
lr: 0xfffffff00d5a6934 fp: 0xffffffe015cfba00
lr: 0xfffffff00cedf7b4 fp: 0xffffffe015cfba30
lr: 0xfffffff00ced0be4 fp: 0xffffffe015cfbaa0
lr: 0xfffffff00ced2b0c fp: 0xffffffe015cfbb50
lr: 0xfffffff00ced031c fp: 0xffffffe015cfbbe0
lr: 0xfffffff00ce97780 fp: 0xffffffe015cfbc10
lr: 0xfffffff00cca6abc fp: 0xffffffe015cfbc50
lr: 0xfffffff00cca6340 fp: 0xffffffe015cfbc90
lr: 0xfffffff00cd44514 fp: 0x0000000000000000
panic(cpu 1 caller 0xfffffff00cedf7b4): x86 CPU CATERR detected
Debugger message: panic
Memory ID: 0x6
OS version: 17P4263
macOS version: 19E266
Kernel version: Darwin Kernel Version 19.4.0: Mon Mar 2 20:38:56 PST 2020; root:xnu-6153.101.6~2/RELEASE_ARM64_T8010
Kernel UUID: 3695E9D9-323E-350E-9A6E-65819BE397D7
iBoot version: iBoot-5540.105.2
secure boot?: YES
x86 EFI Boot State: 0x16
x86 System State: 0x0
x86 Power State: 0x0
x86 Shutdown Cause: 0x5
x86 Previous Power Transitions: 0x405060400
PCIeUp link state: 0x89271611
Paniclog version: 13
Kernel slide: 0x0000000004ea8000
Kernel text base: 0xfffffff00beac000
mach_absolute_time: 0x20bb0ffa65
Epoch Time: sec usec
Boot : 0x5e8634e6 0x000ba538
Sleep : 0x00000000 0x00000000
Wake : 0x00000000 0x00000000
Calendar: 0x5e864bc3 0x0008fcde
Panicked task 0xffffffe000212400: 3168 pages, 214 threads: pid 0: kernel_task
Panicked thread: 0xffffffe000530a90, backtrace: 0xffffffe015cfb4b0, tid: 349
lr: 0xfffffff00c770764 fp: 0xffffffe015cfb4f0
lr: 0xfffffff00c7705c0 fp: 0xffffffe015cfb560
lr: 0xfffffff00c88ae7c fp: 0xffffffe015cfb610
lr: 0xfffffff00cd3962c fp: 0xffffffe015cfb620
lr: 0xfffffff00c76ff28 fp: 0xffffffe015cfb990
lr: 0xfffffff00c770280 fp: 0xffffffe015cfb9e0
lr: 0xfffffff00d5a6934 fp: 0xffffffe015cfba00
lr: 0xfffffff00cedf7b4 fp: 0xffffffe015cfba30
lr: 0xfffffff00ced0be4 fp: 0xffffffe015cfbaa0
lr: 0xfffffff00ced2b0c fp: 0xffffffe015cfbb50
lr: 0xfffffff00ced031c fp: 0xffffffe015cfbbe0
lr: 0xfffffff00ce97780 fp: 0xffffffe015cfbc10
lr: 0xfffffff00cca6abc fp: 0xffffffe015cfbc50
lr: 0xfffffff00cca6340 fp: 0xffffffe015cfbc90
lr: 0xfffffff00cd44514 fp: 0x0000000000000000