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Expected Behaviour:
All web pages load fine, without ads, as they did before I recently re-imaged and updated the pi-hole on the same rpi 3 B+ it'd been happily running on for a couple of years.
Actual Behaviour:
Many but not all web pages load about half way, then stop loading—Safari's "X" close icon on the right hand side of the address bar never changes to be a "" reload icon, the page freezes.
https://www.dyson.co.uk is a good example, but it happens with others. I know it's the pi-hole's fault because when I turn it off temporarily everything works fine.
Debug Token:
Everything had been working great in the previous incarnation of Pi Hole on this hardware, but recently I had to re-image the pi (I think the SD card died); now with maybe about 30% of websites I get this behaviour where the page loads maybe half way then just stops. Safari's frozen, its right hand side address-bar icon never changes from cancel to reload, the page is mostly blank and I can't interact with anything that is there.
How do I even go about diagnosing what's wrong?