Some of the keys feel squishy when pressed, not clicky like the others.
Explanation of Issue
Eos family face panels use elastomer light blockers around the switches to prevent light bleed to other keys. These light blockers can sometimes get loose in shipping.
If they did get knocked loose in shipping, repeatedly tapping that key can usually force the light blocker back in place.
If repeatedly tapping that key does not resolve the issue, the light blocker may be in the incorrect orientation.