Tanner's first fumble he was hit trying to throw and probably should have been taking a sack.
At least one of the other pics he was hit on the release.
One of the pics the DB beat the ball to the man, (should have been a PI called) ball popped into the air for an uncontested pick six.

Some of them are a little fluky but many have been forced.

However this doesn't mean there is no way to cut down on TOs. Tanner was pressing early. Should have taken the sack on that first one for sure. It is clearly the biggest contributing factor to the 5-0 streak, especially when you look at points off turnovers. Direct points. Defensive TDs.