I don't recall when Safari was last updated. This phenomenon started about the same time I updated Mac OS to 10.15.5. This indeed would bring up the record, but would display only the top-left 1/8 of the page - whether it be a will, or a whatever document, rendering it useless. To be specific, I would bring up a record, the information for which had been transcribed, and there would be a thumbnail image of the basic record itself with a tab saying 'click to view full record'. I was able to live with this on/off situation until about 3-4 weeks ago, when records on Ancestry suddenly started to display improperly. Numerous calls to Ancestry ended in frustration with their stock answer: clear your cache and try another browser. I had no problems with Ancestry until this last year, when it would have problems saving records, albeit intermittently.
2013 reporting incompatibility of Safari with the app Ancestry.
