As title, and the problem can be seen in the screenshot (left: Firefox, right: Chrome) below. You can also refer to https://jsfiddle.net/mfk1u9yz/ for the test case.

• Operating system and version: Windows 10 and Android
• Browser and version: Chrome 70 (works okay in Firefox)
• Version of Bootstrap-Vue that you are using: 2.00-rc.11
• Reduced test cases: https://jsfiddle.net/mfk1u9yz/