gen~ data operator - max length 512?

Hi all,

Been trying to figure out the max length of gen~'s [data] operator array, and it seems like i can't make it work with more than 512 samples (like 1024). While i've read that's the default value, but I didn't expect it to be also the maximum number. Is it only me, or is that really it?

I wonder why when I'm using it with wave operator and buffer (which takes in waveform drawn in multi slider), it keeps trimming the waveform halfway at 512...