Dropbox app fills up entirely the local iPhone storage

I have the exact same problem. I spent a lot of time looking this up and troubleshooting (deleting cache and such). It seem to boil down to the Camera Upload feature as PassedBy2 mentioned. The space occupied by Dropbox seem to roughly match the Camera Upload size. BUT... I just tried emptying the Camera Upload folder on my Desktop which immediately reflected on the Dropbox app home page, then I emptied the cache and restarted the iPhone. Unfortunately... no change at all. I still see 4.33GB being occupied by data from the iPhone local Storage perspective (Despite Dropbox app saying it's occupying no space locally). 🤯 Important note: Camera Upload is a great feature and my main way to move my pictures from iPhone to my PC (and back it up in Dropbox). This is one of the reason why I used Dropbox. I also have a LOT of files on my PC syncing with Dropbox and a LOT of files Online only. So uninstalling dropbox on my desktop to troubleshoot is not an option. I could uninstall the app from my iPhone if you think it may help but only if I'm sure it won't have any impact on my PC/Cloud. (By the way I have 2 PCs syncing with DB)
Thanks in advance !