Most squid tend to go for the jig on the drop hence why you’re hooking up when whipping the rod at other times on a very “sloooww” retrieve, mix it up. I’m land based & use braid if I’m winding slow I’ve got a slight bow in the line from the tip & occasionally surge or the bottom will straighten it out in which case move the rod tip slightly & if in doubt strike. The bottom tends to be a clunky in which case I give a bit of slack & lift, if feeling tension strike straight away to set hooks, not to hard though, at times they wil be aggressive and other times tentative with there candles which are soft & easly break if you strike to hard. At night time they can be higher in the water column especially around a light source. I find when they are shy & feel resistance they tend to drop it in which case let the jig drop down near the bottom & slowly wind, I’m no expert but this is what I’ve noticed, I still come home with zero at times