Segfault in AI2-Thor Docker

I'm seeing this error in the Player.log file:

```
================================================================= [0/1846]Got a SIGSEGV while executing native code. This usually indicates
a fatal error in the mono runtime or one of the native libraries
used by your application.
=================================================================

Caught fatal signal - signo:11 code:1 errno:0 addr:0x7f927cb4d00c
Obtained 12 stack frames.
#0 0x007f927a1e78a0 in funlockfile
#1 0x007f92757a2c6d in _nv044glcore
#2 0x007f927570e714 in _nv044glcore
#3 0x007f927b09c76c in ApiGLES::SetVertexArrayAttrib(unsigned int, unsigned int, VertexFormat, unsigned char, unsigned int, void const*)
#4 0x007f927b07c6fb in SetVertexStateGLES(ShaderChannelMask, VertexChannelsInfo const&, GfxBuffer* const*, unsigned int const*, int, unsigned int
, unsigned long)
#5 0x007f927b0884b6 in GfxDeviceGLES::DrawBuffers(GfxBuffer*, unsigned int, GfxBuffer* const*, unsigned int const*, int, DrawBuffersRange const*,
int, VertexDeclaration*)
#6 0x007f927b049032 in GfxDeviceWorker::RunCommand(ThreadedStreamBuffer&)
#7 0x007f927b04971b in GfxDeviceWorker::RunExt(ThreadedStreamBuffer&)
#8 0x007f927b03f2f5 in GfxDeviceWorker::RunGfxDeviceWorker(void*)
#9 0x007f927b44561a in Thread::RunThreadWrapper(void*)
#10 0x007f927a1dc6db in start_thread
#11 0x007f9279f05a3f in clone
```

I'm running on AWS using a modified version of https://github.com/allenai/ai2thor-docker. It seems to work sometimes (no segfault), but I haven't exactly pinned down when it does and doesn't work. Any advice on further steps to take? Thanks!