Safari address bar glitches after update

Last week I updated to Safari Version 26.1 (20622.2.11.119.1) on my 2019 3GhZ 6 core Intel i5 iMac running Sequoia 15.7.2 (24G325).

Previously the browser had been blazingly fast. Now however it glitches when you go to add an address in the top bar. It stalls after the first letter is typed, then picks up but if you're not looking at the screen it will search for A or F if they are the first letter.

It also takes longer to bring back pages.

I've restarted both Safari and the Mac without success. Is there anything else I can do please?

The Etrecheck report is below. NB, I know I am running a non-Apple SSD but the old Fusion Drive ground to a halt a couple of years ago and cost meant it was the only option at the time.

Will