Hey there! I just double checked the tiles and it seems that an old version of the "interior-tiles-furniture-1" has snuck into the zip-file, which is missing the bed tiles. So I am not sure how you even attemted mapping a bed, but sorry for the confusion, that is entirely my fault. I have replaced the old file with the proper version. So if you download the zip-file again, there should be a bed, pillows and a bedsheet in the bottom right corner of "interior-tiles-furniture-1".
And thank you for letting me know! I hope now everything is in order now, but I will more thoroughly double check all the files over the next few days.