Buffer Out Of Bounds Errors in Android JNI with Filament

[dolfancole]

I'm trying to move some code from the Android/Kotlin side of my app over to a JNI layer. Unfortunately, I'm running into issues with just setting the index and vertex buffers. I've created and configured the engine, view, scene, camera, renderer, etc., the exact same way I had them on the Kotlin side. And I'm also trying to create the buffers in the exact same way -- modified as per examples and sample code posted. This is the code I have for creating the buffers ('vertices' is a simple vector of four float3 elements).

std::vector<unsigned short> indices;
for (unsigned short i = 0; i < vertices.size(); ++i) {
    indices.push_back(i);
}
indexBuffer = IndexBuffer::Builder()
    .indexCount(indices.size())
    .bufferType(IndexBuffer::IndexType::USHORT)
    .build(*engine);
IndexBuffer::BufferDescriptor indexBufferDesc(
    indices.data(), indices.size() * sizeof(unsigned short)
);
indexBuffer->setBuffer(*engine, std::move(indexBufferDesc));

std::vector<float> vertexData;
for (auto & vertex : vertices) {
    vertexData.push_back(vertex.x);
    vertexData.push_back(vertex.y);
    vertexData.push_back(vertex.z);
}
vertexBuffer = VertexBuffer::Builder()
    .bufferCount(1)
    .vertexCount(vertices.size())
    .enableBufferObjects(false)
    .attribute(VertexAttribute::POSITION, 0, VertexBuffer::AttributeType::FLOAT3, 0, sizeof(float3))
    .build(*engine);
VertexBuffer::BufferDescriptor vertexBufferDesc(
    vertexData.data(), vertexData.size() * sizeof(float)
);
vertexBuffer->setBufferAt(*engine, 0, std::move(vertexBufferDesc));

The error I get is that there's an out of bounds detected.
a vertex attribute index out of boundary is detected. Skipping corresponding vertex attribute. buf=0x7054117c4050
Out of bounds vertex attribute info: clientArray? 0 attribute 0 vbo 11 allocedBufferSize 48 bufferDataSpecified? 1 wantedStart 0 wantedEnd 745164

Can anyone point me in the direction of what the issue with this could be? For reference, I'm using tagged release v.1.57.1.

Thanks in advance!