One of the latest rosetta python WUs hanged in a state I've never seen in BOINC earlier:
Postponed: VM job unmanageable, restarting later.
The task is still in this state 12 hours later. I tried updating the project but it didn't change the state.

Properties of the task:

Application
rosetta python projects 0.00 (vbox64)
Name
ralph_local_test_1514_1
State
Postponed: VM job unmanageable, restarting later.
Received
Thu Feb 18 06:06:15 2021
Report deadline
Sun Feb 21 06:06:14 2021
Estimated computation size
80000 GFLOPs
CPU time
00:00:04
CPU time since checkpoint
00:00:04
Elapsed time
00:01:20
Estimated time remaining
03:59:49
Fraction done
0.557%
Virtual memory size
65.04 MB
Working set size
2.79 GB
Directory
slots/2
Process ID
3714704
Progress rate
24.840% per hour
Executable
vboxwrapper_26198_x86_64-pc-linux-gnu

stderr.txt contains:

2021-02-18 06:21:45 (3714704): vboxwrapper (7.7.26197): starting
2021-02-18 06:21:46 (3714704): Feature: Checkpoint interval offset (318 seconds)
2021-02-18 06:21:46 (3714704): Detected: VirtualBox VboxManage Interface (Version: 6.1.18)
2021-02-18 06:21:46 (3714704): Detected: Minimum checkpoint interval (600.000000 seconds)
2021-02-18 06:21:46 (3714704): Create VM. (boinc_83cd064bdf5821a1, slot#2)
2021-02-18 06:21:46 (3714704): Setting Memory Size for VM. (2048MB)
2021-02-18 06:21:46 (3714704): Setting CPU Count for VM. (1)
2021-02-18 06:21:46 (3714704): Setting Chipset Options for VM.
2021-02-18 06:21:46 (3714704): Setting Boot Options for VM.
2021-02-18 06:21:46 (3714704): Setting Network Configuration for NAT.
2021-02-18 06:21:46 (3714704): Disabling VM Network Access.
2021-02-18 06:21:46 (3714704): Disabling USB Support for VM.
2021-02-18 06:21:46 (3714704): Disabling COM Port Support for VM.
2021-02-18 06:21:46 (3714704): Disabling LPT Port Support for VM.
2021-02-18 06:21:46 (3714704): Disabling Audio Support for VM.
2021-02-18 06:21:46 (3714704): Disabling Clipboard Support for VM.
2021-02-18 06:21:46 (3714704): Disabling Drag and Drop Support for VM.
2021-02-18 06:21:47 (3714704): Adding storage controller(s) to VM.
2021-02-18 06:21:47 (3714704): Adding virtual disk drive to VM. (vm_image.vdi)
2021-02-18 06:21:47 (3714704): Adding network bandwidth throttle group to VM. (Defaulting to 1024GB)
2021-02-18 06:21:47 (3714704): Enabling shared directory for VM.
2021-02-18 06:21:47 (3714704): Starting VM. (boinc_83cd064bdf5821a1, slot#2)
2021-02-18 06:21:48 (3714704): Successfully started VM. (PID = '3715155')
2021-02-18 06:21:48 (3714704): Reporting VM Process ID to BOINC.
2021-02-18 06:21:48 (3714704): Guest Log: BIOS: VirtualBox 6.1.17
2021-02-18 06:21:48 (3714704): Guest Log: CPUID EDX: 0x178bfbff
2021-02-18 06:21:48 (3714704): Guest Log: BIOS: ata0-0: PCHS=16383/16/63 LCHS=1024/255/63
2021-02-18 06:21:48 (3714704): VM state change detected. (old = 'poweroff', new = 'running')
2021-02-18 06:21:48 (3714704): Preference change detected
2021-02-18 06:21:48 (3714704): Setting CPU throttle for VM. (100%)
2021-02-18 06:21:48 (3714704): Setting checkpoint interval to 600 seconds. (Higher value of (Preference: 60 seconds) or (Vbox_job.xml: 600 seconds))
2021-02-18 06:21:50 (3714704): Guest Log: BIOS: Boot : bseqnr=1, bootseq=0032
2021-02-18 06:21:50 (3714704): Guest Log: BIOS: Booting from Hard Disk...
2021-02-18 06:21:58 (3714704): Guest Log: vboxguest: host-version: 6.1.18r142142 0x8000000f
2021-02-18 06:21:58 (3714704): Guest Log: vbg_heartbeat_init: Setting up heartbeat to trigger every 2000 milliseconds
2021-02-18 06:21:58 (3714704): Guest Log: vboxguest: misc device minor 58, IRQ 20, I/O port d020, MMIO at 0x00000000f0400000 (size 0x0000000000400000)
2021-02-18 06:23:00 (3714704): ERROR: Vboxwrapper lost communication with VirtualBox, rescheduling task for a later time.
2021-02-18 06:23:00 (3714704): Powering off VM.
2021-02-18 06:23:01 (3714704): Status Report: virtualbox/vboxheadless is no longer running.
2021-02-18 06:23:01 (3714704): Successfully stopped VM.