Thunderbird treating links as RSS feed

[Don]

Once upon a time I attended meetings in Nashua (  - 2006 ).

I am running SuSE Leap 15.2 although was also a problem in previous 
versions. I am using Thunderbird, currently 78.8.0 (64-bit).
Email  links are treated as feeds. When I first click on a link I get  
"verifying the feed" ". Subsequent clicks give
"You already have a subscription for this feed" . If I copy the link and 
paste into a new tab it works fine.

I have tried searching for this problem but have not found anything.

Donald Leslie