I have a Regex that works correctly in tests but not when my run my app. No idea what is going on. Here is the regex expression: Regex.scan(~r/^\[([a-z].*)\].--.(.*).--/msU, text) .
Here is the string I apply it to:

[quote]
--
foo, bar
baz
--

fdfd

The correct scan result is

# [quote]
# --
# foo, bar
# baz
# --
# fdfd

["[quote]\n--\nfoo, bar\nbaz\n--",
"quote",
 "foo, bar\nbaz"]

This is what I get using the regex tester at elixre.uk and also when I run tests with mix test ... However, when I use the above regex expression in my app, the result is an empty list – the regex recognizes nothing. What to do?