There appears to be a padding issue with the Query Result window where it doesn't quite fit within the width correctly. I think this appeared in the last update (or two) and I'm ashamed to say it has caused me several hours worth of debugging joins only to find out that the query was correct all along.
This is the raw output of the window, no settings tweaked or adjustments made.
Note there is a very VERY minor horizontal scroll bar as the content hasn't fitted. But there is no reason for this. The content could fit quite easily. Here I am off debugging why my aggregate isn't working and I'm only seeing a distinct customer count of 3-4 … 🙃
A slight scroll to the right and …
A lot of time wasted for such a minor thing. My guess is that it's related to margins, padding or someone not adding percentages to 100 correctly. It doesn't happen consistently which adds to the ability for it to catch you off guard.