《五雜組》13:29B:

▲ 《字彙補》, 彙賢齋本, 酉集

The evidence from Andrew and Eiso seem to be a non-cognate but identical shaped character, maybe horizontal extension can be done.

”chùng" means "loose, baggy", so these are definitely non-cognate. It is acceptable to unify non-cognate characters with identical appearance, such as U+7551 畑 (Japanese 'field', Vietnamese 'lamp') or VN-F1BD7 and the variant of U+8B49 證 in #11650. However, VN-F1BD7 should be encoded separately from U+28CA2 and U+30FD3