Thanks to @ZeeGee for posting this.
This is reference to this post https://forums.thesims.com/en_us/discussion/985379/problem-keeping-store-items-installed#latest
Basically, the problem I have is that I have problems with the launcher showing store content being installed even though it is installed. When the launcher fails with store items, I will see all the items in the download tab showing a box instead of the picture of the item itself. In the installed tab, only the venue buildings appear (not their exclusive content). If I launch a game, no store items are there and the venue buildings all have their contents replaced by other objects.
I discovered that when this occurs, if I close the launcher, close Origin and relaunch, the store items will eventually show up again. It might take a few tries but usually eventually works. When I install a new expansion, my little trick does not work anymore and no matter what I do, store items will not show in game. Even using a saved Sims 3 folder that is known to work will not work anymore.
Through DMs with @igazor and @ZeeGee, we think we might have an explanation to why this is happening and wanted feedback from others who might be having a similar issue and also leave a trace for those searching the web for a solution. The problem most likely relates to EA play. I dont actually own the Sims 3 base game. I have it because it is part of my EA play subscription. This most likely causes the problem as the different components of EA fail to connect together. The Sims 3 store most likely does not recognize that I have access to the base game and for this reason thinks I am not allowed to use store content.
I will be purchasing the base game next week to see if this fixes the issue.......and see if I have to re download and re install all my store items again.