Suddenly having issues with ibus

I was using ibus on Arch Linux (neofetch below for reference) and it was working perfectly - I was able to switch between languages using my keyboard shortcut, and dead keys were working perfectly. However, suddenly I am having issues: 1) [FIXED] I can't switch language using my keyboard. I can switch by clicking ibus in the i3-bar, and it changes, but when I use my keyboard shortcut (I've tried both Ctrl+Space and Shift+Tab), the small window comes up in the center of the screen, which I can cycle through, however when I release, the language doesn't change to the selected one. 2. Dead keys only work in the terminal, and nowhere else? I can use them as compose keys perfectly fine in the terminal, as well as Emacs (and I'm sure a few other programs), however in Firefox and Discord, for example, they do not work: I use a UK dead key layout, and when I press a dead key (such as '), it simply puts the dead key ´ or ` etc, rather than composing it with my next input, which also means I can't type ' or " by itself, since it will type ´ or ¨. Is there any reason for it to suddenly stop working like this? And, if so (or if not), any ideas on how to fix this? I've already tried completely uninstalling ibus (pacman -R ibus) and reinstalling it, as well as wiping the config with dconf reset -f /desktop/ibus/, however nothing has worked. EDIT: I have fixed the **first** issue by adding the following lines to my .xinitrc, however the second issue remains:

export GTK_IM_MODULE=ibus
export XMODIFIERS=@im=ibus
export QT_IM_MODULE=ibus