ID 229820 - Viewer pixel analyzer freezes after raw data knob on/off/on, must clear buffer to update

Problem summary
When sampling RGB values in the viewer AND in Read node,  switch the checkbox for 

raw data knob on/off/on, the pixel analyzer will freeze/fail to update until you clear buffer/caches.

Customer reported version
nuke.10.0v3

Customer reported platform

Windows10

Steps to reproduce

The following steps reliably resulted in the "frozen" viewer RGB pixel sample values when toggling Read raw data on/off -

Open attached -   JP_VwrPxlAnalysisTest_BUG_rawdata_TF.nk   

1. Render Write4 ColorbarsNk_16bit_sRGB.tif

2. Load Read1 with ColorbarsNk_16bit_sRGB.tif (at default sRGB)

3. Read1 sample RGB pixels Left White Bar=.7500

4. Read1 click raw data ON

5. Read1 sample RGB pixels Left White Bar=.8808

6. Read1 click raw data OFF

7. Read1 sample RGB pixels Left White Bar=.7500

8. Read1 click raw data ON (note: 3rd change)

9. BUG - Read1 sample RGB pixels is stuck at .7500

RESULT: pixel sampler fails to update from .7500

with raw data ON

Pixel sampler will not update correctly until the buffer is cleared

Workaround
Unknown

Reproduced by support
7.0v1-10.0v3  on MacOS 10.10.2

Expected behaviour
pixel analyzer RGB info should update when  Read raw data knob toggles on/off/on

Actual behaviourpixel analyzer RGB info freezes/no update when  Read raw data knob toggled on/off/on