Yes I read the documentation that says it truncates at 64k rows, but as you can see I only have 36k row in total and only 10k are displayed, also, the data is really small, 36k row on 5 columns. I can't see that reaching 2187MB. 

I reduced the query to its minimum to be useful but nothing. It's a time series, when aggregated daily it does display everything but when in hourly it only displays 10k...