Hello, there's a problem with b-checkbox in SSR mode (it works as expected in SPA mode). If you don't pass id like that
<b-form-checkbox>test</b-form-checkbox>

label won't get for attribute. Can be easily checked in fresh nuxt-edge installation.
I suppose it also happens in b-radio component and other components using this.safeId() multiple times before localId_ actually get computed.