I tried the new password which I set for CLI that din`t work. Tried restting the admin password from CLI but it is not allowing me to do so. I got two newly built F5 and facing same problem on both of them.
for other system, i had partner engineer who faced similar problem. i think there was enterprise auditing software or game cheat/anticheat that messed up keyboard input. if havent, please try login using firefox or other laptop