I just know new official release version of MCBE (Which is 1.16.101), i download it. Firstly i enjoying my world with addon installed. And then, i decided to change my skin at Character Creator. As i get there, i was thinking that the Founder Cape's cape is missing from tab is missing since i already owned the Founder Cape skins and cape. But i was wrong. It's still gone, but the skin is still there. Please for the developer, fix this issue so everyone that want their skin with Founder's Cape's cape is enjoying.

PS: Sorry for my bad grammar