I was just playing my GF through the Rescue the Adventurers daily in Chult. I went into the tomb area and came up against a Dancer and some minions. The Dancer did its charm power (I had my shield up, not sure if relevant), but of course I went under its charm. Slowly walked to it, Nothing new. But when it wore off, I couldn't move or use any attacks. I still managed to survive for some time this way, somehow (yay healing boons!). Occasionally the Dancer would move away from me, but I would automatically follow it at full walking speed. It was like I was glued to it. It charmed me several more times, but the only difference between charmed or not charmed was the hearts and how fast I'd move toward it.
Eventually I died, and when I respawned, I still had no controls. I had to log out and back in to get it straightened out.