MAJOR ISSUE to report after my upgrade to Oreo firmware.
I was attempting to recalibrate my TV, when halfway through, a new "bug" presented itself. As you adjust the 10 point system, if you do not exit out of the RGB for a specific point, then select and change to the next point, your previous points settings will be copied forward to the new point you are moving to adjust.
So basically, if you adjust your R-offset for point 6, change the value, arrow up to "6", then right arrow over to "7", then arrow down to adjust R-offset for point 7, you will find that the value you entered into 6 has been copied into point 7. If you arrow down to G-offset and then B-offset, it will instantly copy over the previous points values to those as you simply move to the adjustment level.
to avoid this, you must BACK button out of the current points offset menu, then arrow to the point selector, press select, then arrow to the next point and continue as normal. this adds a lot more button pushing, and if you forget to do this, you will botch the point you just moved in to adjust.
This assumes this bug is not specific to my TV.