Safari and JS-Injection

Hi
Every time I open Safari I get several Infection Blocked signs from Avast. It doesn’t matters what web I go.

It seems related to the web www.bangkokbeyond.com/en/

File: /tmp/proxy-I49pkw/Hvpo8z/{gzip}

Process: /Application/Safari.app/Contents/MacOS/Safari

NOTE: In File info, the segment BEFORE {gzip} changes every time.

TIA

Does this help?

empty safari cache
https://guides.instructure.com/m/4214/l/334964-how-do-i-clear-my-browser-cache-on-a-mac