Solved
Objects disappearing while playing and not in my inventory
Product: The Sims 4 Platform:PC Which language are you playing the game in? English How often does the bug occur? Often (50% - 99%) What is your current game version number? 1.102.190.1030 What ...
Try a game repair. In Origin, you can do that by right clicking on the game in your library.
Edit: How to repair in Steam - https://answers.ea.com/t5/Technical-Issues-PC/How-to-repair-game/m-p/12278787#M243567
(I swear there's a description of EA app's repair on here somewhere)
