Macbook Pro re-starting when closed and disconnected from power

Hi there,

I had a MacbookPro mid-2012 16" that strangely started re-starting when not connected to power and closed even though the battery was full. This happened after I had the battery replaced so I was advised that it was a hardware issue and since the machine is so old, it was simply starting to corrupt. I subsequently bought a new 2019 MacBookPro 16 inch, 2,3 GHz 8-Core Intel Core i9 1 TB SSD and have just experienced the same issue with the machine re-starting while closed and disconnected from power even though the battery is full. This is therefore a software issue in my opinion. I have updated all apps (except for upgrading to Big Sur, I'm currently running Catalina 10.15.7 and am too nervous to upgrade). I also don't use any peripherals like extra screens. Here's the problem report I received. Any help appreciated - hate to think I've bought a brand new MacBookPro to solve a hardware problem that's actually a software fix - but would still like the fix :)

panic(cpu 0 caller 0xffffff8001a8f08c): Sleep transition timed out after 180 seconds while calling power state change callbacks. Suspected bundle: com.apple.driver.AppleBCMWLANCore. Thread 0x5457b. Backtracing specified thread Backtrace (CPU 0), Frame : Return Address 0xffffff9228683900 : 0xffffff8001440868 0xffffff922839bc40 : 0xffffff800133b4d1 0xffffff922839bcb0 : 0xffffff8001339d0f 0xffffff922839bd00 : 0xffffff800143d969 0xffffff922839bd40 : 0xffffff800143d1cb 0xffffff922839bd70 : 0xffffff8001a2a138 0xffffff922839bda0 : 0xffffff8001a2d049 0xffffff922839be00 : 0xffffff8001a123da 0xffffff922839bea0 : 0xffffff8001a11d04 0xffffff922839bec0 : 0xffffff800135b605 0xffffff922839bf40 : 0xffffff800135b131 0xffffff922839bfa0 : 0xffffff80012bf13e BSD process name corresponding to current thread: kernel_task

Full problme report added in Additional text box