Yeah looks like either live with it, or reinstall runelite, or maybe these are little things that will get more aggressive telling me to switch over to Jagex launcher and jagex account.
I don't think runelite would have anything to do with it cause it's not a runelite feature, but I guess it couldn't hurt. Just not sure why it would be happening at all. I never had issues dropping anything from salvaging.
Only time I ever have an issue like that is when I use 2 monitors (always) and say im salvaging on one and jsp'ing on the other. Sometimes I'd forget to click back on osrs before pressing shift and attempting to drop, so that first click wouldn't drop but the rest would. Maybe you're doing that?