Mine did the same thing. They have to hold their breath when they drink and then swallow a few time to get all the water out of their mouths before they can take a breath.
Seems like sometimes they drink more than they intended and/or it takes longer than they planned to get it all down away from their trachea so they can take a breath. Just like when we are really thirsty and guzzle a bunch of water then take a deep breath afterward.
Just one more thing to keep an eye on.

Could be a reduced ability to swallow efficiently but more likely they just took in more at once than they intended...