It’s really easy to get your bait snagged in current. It’s hard to really gauge what your bait is doing on the bottom when fishing current and if you get slack in your line, you can run into several issues. The current will create a bow in your line, making it harder to detect a bite, harder to set the hook and easier for your bait to snag.
So anytime I’m fishing a bottom bait like a jig, shaky head or single swimbait in current, I’ll fish it on a semi-tight line. I do this so I can tell what’s going on.
With my line tight, I can feel a bite better, set the hook more efficiently and avoid getting snagged. Tight-lining a bait allows it to wash along the bottom but hopefully not get washed under a rock, log or other obstruction.