It's a bug. In StarPort services when you repair, refuel or re-arm, the respective highlighted box then no longer highlights as you have completed that task.
So, following that logic the 10CR repair should also un-highlight once you press it once. Subsequent presses no longer take CR off your account nor does it further repair your ship. So there is no reason for it to remain highlighted, yet it does, constantly for no reason.
I am very aware about the minimum repair cost being 10CR but that is irrelevant. It is about the hightlighted button 'turning off' after it's been used and only highlighting once it needs to be used again (the same as what would happened for refuelling, repairing or re-arming).
If you want I can tell this to you for 1000000000000 times until you relise that the 10CR repair button needs to fit in the rest of the HUD logic.
Whether it's a game-breaking bug or not is irrelevant. I didn't say I was pointing out game-breaking bugs. Just bugs. But if Frontier have time to change the colour of the seats of the Clipper then they damn sure have time to fix this after it reared its ugly head in 1.4 beta.
If anything I'm trying to consider the sanity of those with OCD.
Hope that's cleared that one up
Idk if it was posted ever, but sometimes I log in on my Mac, and 10cr issue is not there. So not only it is a bug, it is PC specific bug. Not sure if it exists on xBox.