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Hello @caseyt94 the candy necklace going missing is part of a bigger issue that causes all of the game's features to disappear. All you have to do is play a level and then return to your map/event screen and the next time you play a level your Win Streak should appear.
Note that the issue can be tricky and if your Streak doesn't reappear after playing a level then you might have to play and win a new level. Furthermore you might even have to play and win two new levels. After playing a level always return to the map/event screen before playing the next.
Sam's Sweet Streak seems to have been removed from the game at the moment.