Hi, I bought a new SW-Motech tank bag for my GSA before Christmas, when I fitted it and tested it several times everything was working great, because the tank holds a lot of fuel I didn't need to fill up for quite a while being as the weather has been cold, icy and slippery a lot of the time, last week I decided to take the tank bag off to leave at home whilst I go fill up with fuel, I pulled on the red chord and it would not release the bag, I pulled and tugged on it really hard for ages and it still would not release, I was almost at the point of taking the inner screws out so I could get the bag off and see if I could find a way to get the plastic part off, I tried one last time wrapping the red chord around the handle bars and putting as much tension on it as I could without breaking the chord, it finally snapped back and I could get the bag off, pulling the chord whilst the bag is off it works fine, I can't see why it wouldn't release, it would be a real pain in the arse if it happened on a trip every time you need to fill up for fuel, I wonder if anyone else has encountered this problem yet?
Maybe when you have the bag off, spary a little WD40 on the moving parts under the bag, those magnets and revolving parts. Might also be worth reaching out to SW-Motech. Their support is very good answering questions.