Describe the bug

When setting blank-src in the b-img-lazy component that image is never loaded

Steps to reproduce the bug

1. Go to https://codesandbox.io/s/musing-cohen-o73n9?file=/App.vue:380-414
2. Load page (maybe with slow 3g)

Expected behavior

I expect b-img-lazy to load the blank src and swap with the original src once downloaded.

Versions

Libraries:

• BootstrapVue: 2.21.2
• Bootstrap: 4.5.3
• Vue: 2.6.12

Environment:

• Device: Desktop
• OS: Ubuntu 20.04
• Browser: Chromium
• Version: 88.0.4324.182

Demo link

https://codesandbox.io/s/musing-cohen-o73n9?file=/App.vue:380-414

Gif showing that there is only 1 request: