Client Bugs Then Stops Responding

This has happened to me a few times before, but now it's starting to get ridiculous. Sometimes when I load into champion select for draft pick, the client is very clearly missing some textures (ex. map isn't visible, summoner spells aren't labeled, champion portraits aren't visible) and then after going through the entire ban and pick process (or towards the end of it), the client just stops responding and I have to close it out. Fortunately, I haven't been penalized for this happening, but it's annoying and it bothers me that the people I loaded in with have to deal with it too.

The image is what happens later in champ select. This is when the client stopped responding and the champion portraits appear as they are selected