One problem is https urls don't seem to work properly, the colon seems to be stripped from the input. https://duckduckgo.com https://duckduckgo.com changes to

One problem is https urls don't seem to work properly, the colon seems to be stripped from the input. https://duckduckgo.com https://duckduckgo.com changes to https//duckduckgo.com, which doesn't work, so you have to resort to the unsecure version.