Password issue results in force quit

Hello and Good day;

I've been experiencing a peculiar problem that I would like to get some help on.

O/S - Yosemite (latest update)
16GB Ram
256GB EVO primary drive (Samsung)
128GB PRO secondary drive (Samsung)
RDM 2.5.4 (Enterprise licence)
Dual monitors, multiple desktops (virtual) x 10

Issue - consistent, no variation.

Open program, select target and open;
Mistype password (FYI - strong, phrase, greater than 20 characters);

The net result is that the only way to gain access after this sequence of events is to Force Quit and start over.
I have noticed, however, if I hit the escape key before attempting to retype the password, and then 'open' the target computer again, the above sequence does not occur and I am able to proceed as usual.
Any possible ideas or is there something that I'm missing?
Thank you,

Berold B