Yikes!
Considering their use in northern climes in the USA, and in night cargo work, I'm amazed that there weren't more losses through icing.
The Aer Lingus one at Castle Don. is notable. The Loganair incident at Edinburgh, was down to engine ice ingestion, so I read in the AAIB report.
I seem to recall reading a "I Learnt About Flying From That"-type article about a 360 having similar problems, which prompted the question.
Was this characteristic documented, or was it a case of learning on the job (quickly and memorably...)?