I set up several hundred characters with tokens that included vision settings. I saved the new tokens with vision info as the default tokens on the character page and then imported the characters to my vault. Everything was working well for a while. Several months later I noticed I was no longer getting vision from tokens that worked correctly previously. Looking into it further most of my tokens have had vision turned off in the advanced lighting settings and lost the legacy vision info I'd previously set up (the ones that are working were set up within the last few weeks-everything set up before then lost vision). When vision and night vision are turned back in the advanced lighting pages the night vision distances I'd previously set up are still there but I apparently have to go through every individual token to turn on vision again and then save/import them again. The legacy lighting info seems to be just lost. Given how many hours I spent on this the first time I'd like to understand what could have happened to delete the data/change the settings on so many tokens/characters so I don't end up wasting my time again. Any assistance is appreciated.