We should at least wait until we know if Jones is actually not starting. That said is it really a shock?
Because of the injuries Jones was playing RG most of camp and the preseason, if you read there's a story where Hump goes into detail saying how impressed he was with Jones just moving to Guard and not missing a beat. He said I know how hard it is to change sides at Tackle, like Jones did, I've never played guard I can't imagine how tough that would be to go from LT to RT to RG for a 2nd year player.
I know the common thinking is they moved him to guard because they thought Beachum was better but it may have simply been they knew of the 2, Jones had a better chance of actually playing guard so why move Beachum? But it clearly made it harder for him to win the RT job when he was playing RG.
It would not surprise me at all if he's the starting RG, we haven't seen any actual announcement and the depth chart is often wrong. If he's not and goes back T then yes it's a bit disappointing but he's had a pretty unusual first 2 years last year the whole thing with Covid and then this year change positions in camp and then potentially get moved back after the preseason.