Rescript 11.0.0-rc.5 gentype import bug (RescriptCore)

Hi there. First of all. Big thank all of you guys for a great work and pace of developing rescript!
in a rc-5 i got some issues with shims

If I using "bsc-flags": ["-open Belt"] with

"shims": {
      "Belt": "Belt"

then generated ts import looks ok import type {List_t as Belt_List_t} from '../../../shared/shims/Belt.shim';

but with "bsc-flags": ["-open RescriptCope"] as I usualy do
I got import type {t as List_t} from './List.gen';
Cannot find module './List.gen' or its corresponding type declarations.

for result type imports is gone at all