I climbed Beinn Bhan & Sgurr a'Chaorachain (2 July); Aonach Buidhe (3 July) & Creag Liath (4 July). When I started out I had a black Paramo gillet (medium) folded up in its own pocket in my rucksack.
The weather was brilliant & I didn't need to wear it. When I got home a few days later it had disappeared. Its possible it fell out of the rucksack on one of these hills