You might find a link of yours not behaving as expected on some social websites like YouTube, LinkedIn, Facebook, or Instagram. This is due to each website interacting with our links in slightly different ways.
This may happen if you type in the link. The way to remedy is to make sure you're using the "copy" button directly from the Bitly interface as shown in the screenshot below. Pasting that copied link should result in a working hyperlink.
For specific issues sharing to Facebook, visit Why doesn't my link look right when I share it on Facebook?