Here is D3D statistics for Bubblemark test on JavaFX printed by my perf-counter which is being reviewed:

D3D Statistics per last 1 frame(s) :
    numTrianglesDrawn=84002, numDrawCalls=41372, numBufferLocks=41372
    numTextureLocks=0, numTextureTransferKBytes=0
    numRenderTargetSwitch=2, numSetTexture=3, numSetPixelShader=2

This numbers are very strange to me and it seems to be a bug.
We must not have so much drawcalls and buffer locks per frame in a scene with only one texture