[MC-53164] Scores in a TellRaw command show as ? for me and a value for others

When playing in multiplayer, a tellraw command that shows a score for others shows as ? for me. The command I used is:

 tellraw @a {text:"You have been playing for: ",color:gold,extra:[{score:{name:"Hours",objective:"Timer"},color:green},{text:" Hours, "},{score:{name:"Minutes",objective:"Timer"},color:yellow},{text:" Minutes, and "},{score:{name:"Seconds",objective:"Timer"},color:red},{text:" Seconds. "}]}

Is this happening for other people? I am running on Mac OSX, and receive this problem with any score showing in a tellraw command.