Hi there, I hope this will work on your Safari.
Usually, when I encounter a problem with Safari I first try to clear its history and cache/website data.
Please give it a try. ( thought the cons here is your Mac will 'forget' the autocomplete information you are probably used to it filling in, such as passwords and login details. )
Open Safari > On the menu bar , click Safari > Click Clear History > choose All history ( recommended ) > click Clear History
This will clear the history and website data stored on your safari