InitializeSandbox() called with multiple threads in process

[jcr]

Hello,

I have a CEF (1916) app running with OSR on linux.

Every time I loadURL a flash enabled site there is a pause and I see 4 attempts to run the utility process and each dies with the following error:
InitializeSandbox() called with multiple threads in process utility

The utility process then aborts itself with SIGABRT) and dumps core.
I have the npapi flash plugin and I can see it being loaded when i enable --debug-plugin-loading.

All my attempts to disable sandbox with parameters did not help. Only running with --single-process alleviates the problem.

I did my best to identify the other running threads and came up with nothing.

has anyone overcome an issue like this and successfully loaded the flash plugin with multi process cef3?

Thanks