I have problem with my 2017 MacBook Air, i5, 8GB RAM, 128GB SSD. Mac tends to lag while opening new tab in Safari Technology Preview. It doesn't happen always but its quite irritating. It doesn't depend if there are 10+ tabs or just one, lags just happen from time to time. Is it any possibility to fix it? I have the newest MacOs, no viruses, a lot of space on disc, no programs which run in the background.