Rollups using ARRAYJOIN will wrap in a Medium, Tall, or Extra Tall cell, but those with ARRAYCOMPACT and ARRAYUNIQUE get truncated. I would think this is not the desired behavior.
Note that ARRAYJOIN() returns a text string, while ARRAYCOMPACT() and ARRAYUNIQUE() return arrays. Try appending ‘&''’ (that is, the ampersand character followed by an empty string) to either of the last two functions to cast the response into a string; I expect they will then wrap.
