Invalid URL specified when using servername with dash and password containing ! #24

I ran into a very strange phenomenon:

sql test/test123@sub-server.com:1521/service1
Fails as expected with a I/O error (network could not establish connection)

But adding an exclamation mark to the password
sql test/test123!@sub-server.com:1521/service1
fails with Invalid Oracle URL specified / Unknown host specified.

Even more strange:
sql test/test123!@server.com:1521/service1
fails with network adapter could not be established exception again.

So the combination of servername with dash and password with exclamation mark leads to invalid URL?