Hmm, I would say Maltodextrin is rather stabile under alkaline conditions, as are most polysacharides as you stated and would not react with it specifically. I would also not say it is likely to change colour by just adding dilute acid or base (alkali).
Acidic conditions would indeed cleave the glycosidic bond (bond connecting the sugars), and you would get glucose in the end.
As a general tip, I wouldn't start topics with all capital letters and multiple question marks...