CB flicks rapidly between RX and TX when I key the mic with linear tur

My cb works just fine until I turn on my linear then when I key up it flicks rapidly back and forth between RX and TX. If I hold the mic close to the radio it stops. Any idea what might be causing this problem?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0