When trying to mask passwords with 2 or more dollar ($) characters together, the password is not masked
e.g. pa$$word is not masked

Also, the console log shows this with only one dollar character
e.g. if you add a window batch command:

echo %PASSWORD%

with pa$$word as %PASSWORD% the console will show:

D:\jenkins\workspace\hp_test_job>echo pa$word
pa$word

notice only one dollar in output ... is $ an escape character?