Trident disappear when you hold shield

1. Let the right hand empty(or hold other thing, except trident) and the left hand hold the shield. then press the right mouse button to use shield.
2. The right hand switch to trident with keeping shield was used.
3. If a mob hits you at this moment, the shield will temporarily be unavailable and the trident will begin to charge.
4. Releases the left mouse button to throw trident，trident will disappear instead of being throw out .