Homepage doesn't load

I have been having this problem for sometime now. My homepage doesn’t load, whereas, the other pages do. Sometimes the homepage just doesn’t load and there is no error message. Sometimes I would get the 500 internal server error.

Some of the steps I have taken at various points in time-
a) renamed the old htaccess file to some other name.
b) deleted the file home.html that appeared from nowhere
c) resaved WP Rocket settings and the permalinks without changing anything in either of these

A lot of times doing one or both of a) and c) helped. Needless to say deleting home.html also helped.

But then the problem would re-occur. I then thought the revolution slider plugin may have something to do with it or it may not be working fine with WP Rocket. This was just a thought without any specific information. So I created a new homepage and used ‘Image Carousel’ instead of the revolution slider plugin. The homepage worked fine for a couple of days and the problem re-occurred.

Now the strangest part is if I set the inbuilt standard wordpress/ woocommerce ‘Shop’ page as homepage then I never face loading issue.

Will someone please throw some light on this? From various forums and support requests I could figure out the actionables mentioned in points a), b) & c). Now I am clueless.