On my Dell Inspiron laptop after I updated Thunderbird a while back, when I search for an email by name, it finds them, but when I click on that email to read it, it goes to another unrelated email, so why is that and how to fix it?

After a recent update to Thunderbird (months ago), I found that when I search through my emails by name, it will find those emails and list them for me. But when I go and click on one of those found emails, it arbitrarily brings up some unrelated email - it never brings up the one that I click on.

How can we fix this? Thanks. Dr. Howard Neufeld