netplan ip leases wlan0 -> traceback

$ netplan ip leases wlan0
Traceback (most recent call last):
  File "/usr/sbin/netplan", line 23, in <module>
    netplan.main()
  File "/usr/share/netplan/netplan/cli/core.py", line 50, in main
    self.run_command()
  File "/usr/share/netplan/netplan/cli/utils.py", line 186, in run_command
    self.func()
  File "/usr/share/netplan/netplan/cli/commands/ip.py", line 57, in run
    self.run_command()
  File "/usr/share/netplan/netplan/cli/utils.py", line 186, in run_command
    self.func()
  File "/usr/share/netplan/netplan/cli/commands/ip.py", line 76, in run
    self.run_command()
  File "/usr/share/netplan/netplan/cli/utils.py", line 186, in run_command
    self.func()
  File "/usr/share/netplan/netplan/cli/commands/ip.py", line 150, in command_ip_leases
    key, value = keyvalue.strip().split('=')
ValueError: not enough values to unpack (expected 2, got 1)
$

This is netplan.io 0.99-0ubuntu3~20.04.2 on Ubuntu 20.04.

Netplan is not managing wlan0, so I don't expect the command to work, but I don't expect a Python traceback.