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I'm pretty sure it just needs drying. Like everybody here says it's normal, and I called the shop & they told me the same thing. And I just took it out & there seem to be a lot less bubbles than there were before.
Has the weather been cool in your area since the tint job? That could be slowing the drying process.
Sometimes defects occur that require a redo of a certain window, but a good shop will graciously take care of it at no cost to the customer.