Port forwarding to a VirtualBox image fails after suspend-resume

We use vagrant to setup a VirtualBox image with Ubuntu Linux. It has private network enabled, and a number of ports are forwarded - here are some snippets from our Vagrantfile:

config.vm.network :private_network, ip: "192.168.33.10"

config.vm.network "forwarded_port", guest: 3306, host: 3306  #mysql
...
config.vm.network "forwarded_port", guest: 8098, host: 8098  #riak http
config.vm.network "forwarded_port", guest: 8087, host: 8087  #riak pb

This works allright when the VM is started.

But after the host machine has been suspended for a while (more than a brief period) and resumes, then the port forwarding does not work any more.

Everything responds fine on the allocated private network address, 192.168.33.10, but not on localhost where the attempt just hangs.

Any ideas for a solution?

Specs:

Host OS: Mac OS X, version 10.9 "Mavericks"  
Guest OS: Ubuntu 12.04, precise64 (standard box from vagrantup.com)
Vagrant 1.4.0  
VirtualBox version: VirtualBox 4.3.4 r91027  

Virtual Box > Machine Settings > Network
  Adapter 1: 
    Attached to: NAT
    Cable Connected : True
    Port Forwarding:
      TCP, HostIP=,          HostPort=3306, GuestIP=, GuestPort=3306
      TCP, HostIP=,          HostPort=8098, GuestIP=, GuestPort=8098
      TCP, HostIP=,          HostPort=8087, GuestIP=, GuestPort=8087
      TCP, HostIP=127.0.0.1, HostPort=2222, GuestIP=, GuestPort=22

I found a similar question, but can not seem to use the same answer: VirtualBox port forwarding not working with NAT adapter