Colour pallette bug

A few times over the last 2 show files I've encountered a bug when updating colour palettes.
Using both the "palette, open, update" and "record, merge" Syntax occasionally only the first fixture in the group will save the new information.
I haven't had time to look too far into it, nor have I found a consistent way to replicate this behaviour.
On a new show file, just then I had to knockout the values for the remaining Sharpys (232 - 238) for the new palette info to take effect . I.e there was a value for "All Sharpys" which 231 was correctly referencing then individual references for 232 - 238 which I could not update in the standard methods
I "think" I also saw this behaviour in B-eye's a couple of weeks ago, so it may not be limited to colour wheel fixtures

Gordo