I'm not an Avast Team member but an Avast User - Whilst I'm not an expert by any means, it is very hard to determine what it is.
Is there any occurrence that has changed recently, program installation/update, etc. ?
What were you doing at the time of the alert/s (if the same thing or just browsing may be related).
How frequently is this happening ?
However, another test on the IP address returns an error -
https://www.ipaddress.com/ipv4/89.185.85.175 - this means an interaction is occurring with Cloudflare and there have been instances where this is detected by Avast.
So I would suggest reporting it to the Avast virus labs for Analysis:
You can use the - Reporting a Possible False Positive File or Website -
https://www.avast.com/false-positive-file-form.php.
You should get a response in a day or two.
This is the link/website that you want to report tXp://89.185.85.175:7680 - I have changed the tcp to tXp so the link isn't active in the forums. You should use the Full URL in your image - I would suggest you also give a link back to this topic in your possible false positive website submission, as this contains a lot of additional information that may be helpful.