I just got a new 2019 16-inch Macbook Pro and am having this same problem. Have any fixes been located:
Sleep Wake failure in EFI
Failure code:: 0xffffffff 0x0000001f
Please IGNORE the below stackshot
================================================================
Date/Time: 2020-04-16 19:08:53 -0500
OS Version: ??? ??? (Build ???)
Architecture: x86_64
Report Version: 29
Data Source: Stackshots
Shared Cache: 0xa7ba000 54D344C6-5CA5-38A2-A61D-ED49B2B1B5E4
Event: Sleep Wake Failure
Duration: 0.00s
Steps: 1
Boot args: chunklist-security-epoch=0 -chunklist-no-rev2-dev
Time Awake Since Boot: 37s
Process: swd [330]
Architecture: x86_64
Footprint: 580 KB
Start time: 2020-04-16 19:08:53 -0500
End time: 2020-04-16 19:08:53 -0500
Num samples: 1 (1)
Thread 0xb9b 1 sample (1) priority 4 (base 4)
<thread QoS background (requested background), thread darwinbg, process darwinbg, IO tier 2>
1 start + 1 (libdyld.dylib + 109769) [0x7fff71728cc9] 1
1 ??? [0x10794d454] 1
1 ??? [0x10794d1dd] 1
1 __stack_snapshot_with_config + 10 (libsystem_kernel.dylib + 135862) [0x7fff7188a2b6] 1
*1 ??? [0xffffff80002c8206] 1
*1 ??? [0xffffff80009875f7] 1
*1 ??? [0xffffff80008a0001] 1
*1 ??? [0xffffff80002eb9e7] (running) 1
Binary Images:
0x7fff7170e000 - 0x7fff71744fff libdyld.dylib (750.5) <D2A07EF5-A64B-3692-BE13-89DAA2EC5E80> /usr/lib/system/libdyld.dylib
0x7fff71869000 - 0x7fff71895fff libsystem_kernel.dylib (6153.101.6) <E76440E1-D1E8-3D9A-8B47-D01F554FF1C4> /usr/lib/system/libsystem_kernel.dylib
Model: MacBookPro16,1, BootROM 1037.100.362.0.0 (iBridge: 17.16.14281.0.0,0), 8 processors, 8-Core Intel Core i9, 2.3 GHz, 32 GB, SMC
Graphics: kHW_IntelUHDGraphics630Item, Intel UHD Graphics 630, spdisplays_builtin
Graphics: kHW_AMDRadeonPro5500MItem, AMD Radeon Pro 5500M, spdisplays_pcie_device, 8 GB
Memory Module: BANK 0/ChannelA-DIMM0, 16 GB, DDR4, 2667 MHz, SK Hynix, -
Memory Module: BANK 2/ChannelB-DIMM0, 16 GB, DDR4, 2667 MHz, SK Hynix, -
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x7BF), wl0: Feb 28 2020 15:31:53 version 9.30.357.35.32.5.47 FWID 01-29ff5c69
Bluetooth: Version 7.0.4f6, 3 services, 25 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en0
USB Device: USB 3.1 Bus
USB Device: Apple T2 Bus
USB Device: Composite Device
USB Device: Touch Bar Backlight
USB Device: Touch Bar Display
USB Device: Apple Internal Keyboard / Trackpad
USB Device: Headset
USB Device: Ambient Light Sensor
USB Device: FaceTime HD Camera (Built-in)
USB Device: Apple T2 Controller
Thunderbolt Bus: MacBook Pro, Apple Inc., 55.3
Thunderbolt Bus: MacBook Pro, Apple Inc., 55.3