Ctrl+A doesn't seem to work in 6.0.13 r133688

[reggler]

Hi,

I'm running VB versiuon 6.0.13 r133688 due to running an up to date Arch guest and I'm experiencing a problem on my Windows 109 guest:
I have the host running on Ubuntu (xenial, 16.04) and a Win10 guest with which I'm logged into my work VPN to get access to my remote desktop (from work which is Windows 10, too).
There (on my work host)I open a putty session, to get access to a Linux host on whhich I'm ruinning GNU Screen, and in order to enter the "Command mode", (left)Ctrl+a has to be pressed (for example to switch Windows) - that always worked fine before (I upgraded to the latest VM version), now Ctrlk+a doesn't seem to doi anything anymore, I've removed the (left)Ctrl+A shortut from Preferences, Input, VB Manager - just in case. I've also changed my host key to the right Alt key... but nothing seemned to have helped... is this a known issue, I'm wondering or something new?

Also, this keyi combo (with all the hosts in between, works fine when I VPN to my Win10 host at work through Windows directly and bypass the VM)...

[socratis]

One thing is for sure, you don't make the case easy to reproduce...

First thing I would do would be to downgrade VirtualBox to something that used to work, see if it works...