I've broken it down as best I can. Decide which is most likely: CG removes a red dot at the weekend or user error.
36 hours ago: Made post. C3-P0 at relic 2, but uploading the screenshot failed. The same screenshot (posted lower in the thread) shows us that it cannot only be relic levels that C-3P0 can apply, otherwise the Jawa would have a dot too. Ergo, missing ability upgrades. OP claims they all abilities are maxed.
Some time in following 24 hours: upgraded C-3P0 to relic 3. Didn't upgrade Fretful Mediator.
12 hours ago: swgoh.gg account updates, showing the changes above. This also disproves the OP's claim that they had all the abilities upgraded, as Fretful Mediator was level three. Red dot still there in-game.
Within the last 12 hours: User upgrades Fretful Mediator, as shown by account in-game. Red dot gone.