Like I said, the patch is working fine without the list object. I know it is a bit unconvencinal there, but that is not the problem. I deleted different parts of the patch so I could narrow it down to the list. You can try it with this little patch. same thing. doesn't work with the list.
working:
#N canvas 188 232 513 466 12;
#X obj 183 170 pack 0 0 0;
#X obj 181 123 t f f f;
#X obj 182 245 unpack 0 0 0;
#X floatatom 177 284 5 0 0 0 - - - 0;
#X floatatom 223 284 5 0 0 0 - - - 0;
#X floatatom 269 286 5 0 0 0 - - - 0;
#X obj 177 25 tgl 19 0 empty empty empty 0 -10 0 12 #fcfcfc #000000 #000000 0 1;
#X obj 176 1 loadbang;
#X obj 78 301 osc~ 440;
#X obj 69 434 dac~ 1 2;
#X msg 180 94 1;
#X obj 177 314 bng 19 250 50 0 empty empty empty 0 -10 0 12 #fcfcfc #000000 #000000;
#X obj 180 61 metro 1000;
#X obj 176 343 delay 200;
#X msg 181 370 0;
#X obj 77 377 *~;
#X obj 78 331 *~ 0.4;
#X connect 0 0 2 0;
#X connect 1 0 0 0;
#X connect 1 1 0 1;
#X connect 1 2 0 2;
#X connect 2 0 3 0;
#X connect 2 1 4 0;
#X connect 2 2 5 0;
#X connect 3 0 11 0;
#X connect 3 0 15 1;
#X connect 6 0 12 0;
#X connect 7 0 6 0;
#X connect 8 0 16 0;
#X connect 10 0 1 0;
#X connect 11 0 13 0;
#X connect 12 0 10 0;
#X connect 13 0 14 0;
#X connect 14 0 15 1;
#X connect 15 0 9 0;
#X connect 15 0 9 1;
#X connect 16 0 15 0;
not working:
#N canvas 208 242 450 300 12;
#X obj 183 170 pack 0 0 0;
#X obj 181 123 t f f f;
#X obj 182 245 unpack 0 0 0;
#X floatatom 177 284 5 0 0 0 - - - 0;
#X floatatom 223 284 5 0 0 0 - - - 0;
#X floatatom 269 286 5 0 0 0 - - - 0;
#X obj 177 25 tgl 19 0 empty empty empty 0 -10 0 12 #fcfcfc #000000 #000000 0 1;
#X obj 176 1 loadbang;
#X obj 78 301 osc~ 440;
#X obj 69 434 dac~ 1 2;
#X msg 180 94 1;
#X obj 177 314 bng 19 250 50 0 empty empty empty 0 -10 0 12 #fcfcfc #000000 #000000;
#X obj 180 61 metro 1000;
#X obj 176 343 delay 200;
#X msg 181 370 0;
#X obj 77 377 *~;
#X obj 78 331 *~ 0.4;
#X listbox 187 212 20 0 0 0 - - - 0;
#X connect 0 0 17 0;
#X connect 1 0 0 0;
#X connect 1 1 0 1;
#X connect 1 2 0 2;
#X connect 2 0 3 0;
#X connect 2 1 4 0;
#X connect 2 2 5 0;
#X connect 3 0 11 0;
#X connect 3 0 15 1;
#X connect 6 0 12 0;
#X connect 7 0 6 0;
#X connect 8 0 16 0;
#X connect 10 0 1 0;
#X connect 11 0 13 0;
#X connect 12 0 10 0;
#X connect 13 0 14 0;
#X connect 14 0 15 1;
#X connect 15 0 9 0;
#X connect 15 0 9 1;
#X connect 16 0 15 0;
#X connect 17 0 2 0;