Help s5 Default browser tabs not closing

[szada]

s5 Samsung SM G900A
AT&T

Android v5.0

When I open the Internet browser, I have 5 tabs open in the Tab Manager.

Everytime I tap on the (-) symbol on a browser tab to close it out all of the tabs disappear.

However, when I tap + to open a new tab, all 5 tabs reopen.

What is causing this and how can I close out all of my tabs?

 

[Dandyhandy]

Having same problem. Plus, trying to change to any other tab will only reopen existing or last used tab.

What the...