During a replacement from a backup, my personal inventory/data was completely reset. The biggest lost was in the Ender Chest, where I lost 2 shulker boxes with high level gear, some high level gear NOT in the Shulker box, and some other items (Hearts of the Sea, some other effects to be moved/stored in the End Chest). 

This affected my entire personal inventory. It seems it was all reset back to months ago when I first uploaded the world. This issue affects ALL of the backups in the world. This does NOT affect any one else's inventories. This does NOT affect any other chest in the game. This does NOT affect the world as a whole (that I have noticed). 

Is there any possible way to get my inventory back? There were some items in there that took a long time to acquire.