Cannot read properties of undefined (reading '__labelPrefix') / fn: announceSelected

[phstc]

I'm using a table filter with a select based on this demo and it works fine with NextJS in npm run dev mode, but when I try the production mode npm run build && npm run start it fails with:

framework-50116e63224baba2.js:9 TypeError: Cannot read properties of undefined (reading '__labelPrefix')
    at nt.announceSelected (343-3581d0fc7829ac1f.js:1:37942)
    at 343-3581d0fc7829ac1f.js:1:38086
    at ak (framework-50116e63224baba2.js:9:60918)
    at ui (framework-50116e63224baba2.js:9:71229)
    at i (framework-50116e63224baba2.js:9:121561)
    at oD (framework-50116e63224baba2.js:9:99115)
    at framework-50116e63224baba2.js:9:98982
    at oO (framework-50116e63224baba2.js:9:98989)
    at oE (framework-50116e63224baba2.js:9:95741)
    at ox (framework-50116e63224baba2.js:9:94296)

My sample code:

<div className="select-filter">
  <Select
    data-testid="region-filter"
    options={selectRegionOptions}
    selectedAriaLabel="Selected"
    selectedOption={region}
    onChange={(event) => {
      setRegion(event.detail.selectedOption as any);
    }}
    ariaDescribedby={null}
    expandToViewport={true}
  />
</div>

Any idea on what it could be?

[just-boris]

It is an already known issue: #785

please check the comments there for more details