I have noticed several complaints concerning the bathroom mirror not staying shut while driving. I took delivery of my 2021 Sequence 20L the first week of August and this is one of the first problems I noticed. I found a simple solution. Using a pair of bar magnets ( from AmazonStrong Magnets Rare Earth Neodymium: Bar Adhesive Super Permanent Metal Rectangular, 60x10x3mm), some epoxy putty and one of the metal clips like the one on the original magnetic catch. I found the best place was on the right hand center part of the mirror. I attached one magnet to the cabinet surface using the epoxy putty and clamp to hold it until it set. Then I slipped the metal bracket from Amazon
over the mirror edge. I found if I used a second magnet, on top of the glued magnet, it holds the mirrored door out enough to catch really well. I have used the van several times since I installed these magnets and it hasn't failed to keep the cabinet door shut.