Not just ATR and SAAB or just Type IV. Rehydration events have occurred on a number of aircraft now, and with Type II as well as Type IV. Type III isn't widely used, but there's no real reason it shouldn't do it too - all the anti-icing fluids have thickening agents and those are what cause the problems.
Events have occurred on aircraft with manual controls, but also on some powered control aircraft as well. EASA issued some kind of safety alert about it earlier this year, if I recall correctly, and it's been an active topic of discussion within the SAE fluids world too.