I had the same problem I lost all progress made yesterday including completing weekly strike and nightfall strike, losing all bounties done yesterday, losing two legendary weapons I got from engrams, losing all marks, reputation, and material earned during yesterday game session, also lost all progression I made on exotic bounties I'm afraid of putting anymore time into this game if all my efforts are not going to be saved. I would like some kind of response to this issue either find a way to restore lost data or an adequate compensation for the data that was lost. If bungie doesn't give us a response or doesn't give a response I feel is adequate then I might have to move on from this game that I have been enjoying UPDATE: Might have found a way to recover stuff from yesterday. if u go to your character on bungie.net and switch weapons that u got yesterday while ps4 is off then reboot game looks to fix issues with lost gear and loot. hope this helps some of you looks like I still lost some reputation from some of the factions but at least of got the gear and loot I got yesterday