socket deadlock using Cog VM

Hi,

We are experiencing a deadlock in Socket>>waitForDataIfClosed:

The problem occurs on Pharo11/Pharo12/Squeak41 only when using the Cog VM.
In our particular case, the socket connects to a GOODS database and it started occurring with a growing amount of data (so longer connections, more data transfer).

When you open a debugger on the deadlocked process and proceed the process, it will simply continue and finish without problems.

We are using Cog VM of 4 october, downloaded from Eliot's website (VM.r2316/)

Before I start isolating the problem and reproduce it without requiring GOODS (it's just an http socket anyway): Is anyone else experiencing similar issues here? Is there a fix in more recent versions?

cheers
Johan