Observing strange issue with SendSync

[brainpicture]

At some moment SendSync returns an empty string instead of the result.
In my case, it happens right after calling another package with C bindings (https://github.com/gographics/imagick)
My code:
data := JSWorker.SendSync(opts)
with some probability, data contains empty string instead of a result. looks like a goroutines multithread issue.

[brainpicture]

Even without ImageMagick, I could reproduce this issue, but with much lower probability. So I believe problem occurs when golang calls v8worker from different thread

[emicklei]

any updates on this?