Hi! My son encountered an interesting bug while playing classic (presumably) Tetris today. His version is the gold colored Target handheld one that looks like a miniature arcade machine. At any rate...He started a game that was bizarre to say the least. The only shape he was getting at first was the one that is 1 tile wide and 4 tiles long. Eventually, it would be three of those, followed by either a 2x2 or the L shaped one. Does anyone know what this could have been?
The game from Target seems to most likely be another run of the 2020 "Arcade Classics" version. As far as I can tell from a quick scan of footage on YouTube, it seems like it normally has a 7 Bag randomizer; other videos show players receiving shuffled sets of the seven unique pieces, guaranteeing pieces are distributed equally. So, the behavior you're describing of a repeating loop of either IIIO or IIIL certainly sounds like a programming error.