Polycom phone picks up the wrong line

I have a polycom IP 321 phone with RingCentral. When a call comes into our business or a call is transferred to my extension and I pick up the phone it doesn't pick up the ringing line it picks up line 2 and gives me a dial tone. I have to manually hit the "line 1" button to switch to that line. It never used to do that, it just started doing it a few months ago randomly. I've looked through all the menu options on the phone and can't figure out what the issue is or what might have changed to cause this. It is driving me crazy, any help anyone can provide would be appreciated! Thanks.