On my 2017 Miramar I had the same problem. I took some of the latches apart, lubed, reassembled, etc. My conclusion: These are poorly made latches. Notice the "made in China", I imagine Thor wishes they had stayed with US made latches.
I had several of my latches replaced under the initial warranty. It may be there was a bad run or a bad batch of these. Yes, they can be fixed but you gott'a play with them. Ugh.
Jim
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