Relevé with odd colour behaviour just off blue.

We have 8 of the ETC Relevé automated fixtures, 6 of them purchased together shortly after they come out back in 2019, and 2 purchased a couple years later.

Generally we are quite pleased with them, but 2 of them from the first batch purchased show an odd colour behaviour when selecting (or fading) to a colour just off of pure blue.  These two tend to suddenly jump to a partially Cyan colour, in a very noticeable jump (step?).  These two don't jump to precisely the same hue, there is a noticeable difference between them, while all the others change colour smoothly.

They have done this since they were new.  Any idea if a Firmware update, or something else might fix this?

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