Topix Underground

This:

"For the most part, thanks to their robust nature, compact size, rapid growing time, and tolerance of (almost) all lighting schedules, autoflowering varieties are the easiest cannabis plants to work with.

However, growers will also notice that autos can’t handle very much stress. Or, more specifically, they don't have the time to recover fully after a significantly stressful event. That makes things extra complicated if you find yourself needing to move your autoflowers to a larger pot. Rapid growth complicates this further, as waiting too long can lead to your plants getting root-bound in their containers.

For those reasons, growers should always start autoflowers in their final pot. If that’s not possible, however, you shouldn’t lose hope. It can be a complicated and sensitive process, but transplanting your autoflowering cannabis plants isn’t impossible by any means."

That's exactly what happened.