Same issue for our family, two of my sons (using Apple , iPod and iPad ) lost purchased skin packs, as well as all their remaining coins after the update. I contacted Mojang and they referred me here, clearly we aren’t the only ones affected .
Yes that's the same thing that happens for us too:\
Hi same experience for us , tried the update to 1.2.15 and nothing happened, skin packs still locked ,coins still missing, and we could not purchase the “free” legacy pack