What could be the reason, that Qlik Sense is stuck with left join command? It just freezes and can't go forward from this point and everything ends with 'connection to server timed out' when it has loaded for more than 1 hour.
When I had this issue previously, it turned out that I had a spelling mistake in the alias of the field name I was trying to join to resulting in a massive table being generated. That's the first thing I would check....
