Field type as url issue

I have a field with value like URL.
After I change the field format from default to Url.
it add the "amp;" string
Then the url become wrong.
How can I avoid this problem?

Before:
applicationid=1023&sext1=user123&sext2=MLUW949G

After:
applicationid=1023&sext1=user123&sext2=MLUW949G&

after put http and https in front of the url. it works.

Glad you were able to resolve the issue!