Yep this is a known bug in the jam version. Try to focus on deleting the connectors away from the nodes, it seems that trying to delete the connectors at the nodes can cause two separate calls to delete the same connector (one from the connector and one from the building). This bug is fixed for v1.0 coming soon!
i got a bug when i was sitting here typing stuff and i got an error down for more info
ERROR in
action number 1
of too many letters
for object oboxender
gml_object_oboxender_produce_1 (line 1+)
gml_object_oboxender_produce_1 (line 1+)
gml_object_oboxender_produce_1 (line 1+)
gml_object_oboxender_produce_1 (line 1+)
gml_object_oboxender_produce_1 (line 1+)
gml_object_oboxender_produce_1 (line 1+)
gml_object_oboxender_produce_1 (line 1+)
gml_object_oboxender_produce_1 (line 1+)
gml_object_oboxender_produce_1 (line 1+)
gml_object_oboxender_produce_1 (line 1+)
gml_object_oboxender_produce_1 (line 1+)
gml_object_oboxender_produce_1 (line 1+)
gml_object_oboxender_produce_1 (line 1+)
btw i wrote this cause i wanted to trick ya all by typing a fake error