Got updated deps in my project and catch a bug:

opening a DropDown

bootstrap-vue.esm.js:formatted:1 Uncaught TypeError: t[0].focus is not a function
at VueComponent.toggle (bootstrap-vue.esm.js:formatted:1)
at Proxy.boundFn (bootstrap-vue.esm.js:formatted:1)
at click (bootstrap-vue.esm.js:formatted:1)
at HTMLAnchorElement.invoker (bootstrap-vue.esm.js:formatted:1)

Error-causing code: not located yet.