I just tried out of curiosity to save a T6 RTM while on a page other than the main page and nothing happened to my RTM-- it still was good. Maybe the newer T6 RTM's don't have the "save" problem. I was testing on the Packing list RTM. If this is true of the T6 versions, I doubt that this is your problem. If it is your problem, the RTM is hosed and you will have to start over.
Maybe IS Tech can weigh in on this.