offlineimap cannot acquire lock after system suspend

• system/distribution: Arch Linux

• offlineimap version (offlineimap -V): offlineimap v7.1.4, imaplib2 v2.57 (bundled), Python v2.7.14, OpenSSL 1.1.0g 2 Nov 2017

• Python version: Python 3.6.4

#### Configuration file offlineimaprc
[general]
accounts = aishpant

[Account aishpant]
localrepository = local-aishpant
remoterepository = remote-aishpant
maxage = 2017-12-25

[Repository local-aishpant]
type = Maildir
localfolders = /home/a/mail/aishpant

[Repository remote-aishpant]
type = Gmail
remoteuser = xxx@gmail.com
remotepass = xxxpass
sslcacertfile = /etc/ssl/certs/ca-certificates.crt
folderfilter = lambda folder: folder in ['INBOX', 'LKML', 'attrDoc']

I am using systemd user timer to sync my emails.

#### offlineimap.service
[Unit]
Description=Offlineimap Service (oneshot)
Documentation=man:offlineimap(1)

[Service]
Type=oneshot
ExecStart=/usr/bin/offlineimap -o -u basic
# Give 120 seconds for offlineimap 
# to gracefully stop before hard killing it
TimeoutStopSec=120

[Install]
WantedBy=mail.target

#### offlineimap.timer
[Unit]
Description=Offlineimap Query Timer

[Timer]
OnBootSec=2m
OnUnitInactiveSec=5m

[Install]
WantedBy=default.target

Steps to reproduce the error

• Close the lid during a sync
• Open again, once in a while offlineimap fails to launch with the following error :

OfflineIMAP 7.1.4
  Licensed under the GNU GPL v2 or any later version (with an OpenSSL exception)
imaplib2 v2.57 (bundled), Python v2.7.14, OpenSSL 1.1.0g  2 Nov 2017
Account sync aishpant:
 *** Processing account aishpant
 ERROR: Could not lock account aishpant. Is another instance using this account?
 *** Finished account 'aishpant' in 0:00
ERROR: Exceptions occurred during the run!
ERROR: Could not lock account aishpant. Is another instance using this account?

Traceback:
  File "/usr/lib/python2.7/site-packages/offlineimap/accounts.py", line 282, in syncrunner
    self.__lock()
  File "/usr/lib/python2.7/site-packages/offlineimap/accounts.py", line 246, in __lock
    exc_info()[2])
  File "/usr/lib/python2.7/site-packages/offlineimap/accounts.py", line 235, in __lock
    fcntl.lockf(self._lockfd, fcntl.LOCK_EX|fcntl.LOCK_NB)

I can delete the lock file under ~/.offlineimap/ and start it up again. But I was wondering if there was cleaner solution to this.