how did you find that out because i have the same issue
UUID: F6B96A70-B2B8-4BE9-BCF0-0147746DE21B
Stackshot Reason: Wake transition timed out after 180 seconds while calling power state change callbacks. Suspected bundle: com.apple.iokit.IO80211Family. Thread 0x74.
Failure code:: 0x1ae2d173 00000027
Model: iMac18,2, BootROM 166.0.0.0.0, 4 processors, Intel Core i5, 3 GHz, 8 GB, SMC 2.40f0
Graphics: Radeon Pro 555, Radeon Pro 555, PCIe
Memory Module: BANK 0/DIMM0, 4 GB, DDR4, 2400 MHz, 0x802C, 0x344154463531323634485A2D3247334232202020
Memory Module: BANK 1/DIMM0, 4 GB, DDR4, 2400 MHz, 0x802C, 0x344154463531323634485A2D3247334232202020
AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x16E), Broadcom BCM43xx 1.0 (7.77.61.1 AirPortDriverBrcmNIC-1305.2)
Bluetooth: Version 6.0.9f2, 3 services, 27 devices, 1 incoming serial ports
Network Service: Wi-Fi, AirPort, en1
Serial ATA Device: APPLE HDD HTS541010A9E632, 1 TB
USB Device: USB 3.0 Bus
USB Device: Expansion Desk
USB Device: USB2.0 Hub
USB Device: USB 2.0 Hub
USB Device: Bluetooth USB Host Controller
USB Device: FaceTime HD Camera (Built-in)
USB Device: USB3.0 Hub
USB Device: My Passport 25F3
Thunderbolt Bus: iMac, Apple Inc., 39.2