I have almost the same config as you. Wonder what distro you are using. I use Ubuntu 22.04 with XFCE and i3, installed in that order. However, I noticed that the file chooser for snap apps (firefox, chromium) does not work. Every time I want to save a file, a 'Save as...' dialog appear and when you start typing the file name, the dialog starts showing all file names that matches whatever your are typing (ie it triggers the file searcher).