Testnet exchangeInfo does not response MIN_NOTIONAL filter any more. Is it being deprecated?

I have seen the testnet api responds all symbols now respond with NOTIONAL filter instead of MIN_NOTIONAL but don’t see any update in change log.

Yes, MIN_NOTIONAL is no longer used. Live Exchange is also slowly replacing NOTIONAL.
This is referenced at Binance API Documentation2022-06-15

The change-log of the API documentation lists the introduction of NOTIONAL, but the removal of MIN_NOTIONAL is not listed, and was not announced to users. This was a breaking change.

Binance API Documentation’s purpose is to describe API’s existing functionalities and provide examples to help the developers. Modifications on the symbols filters doesn’t have to be there.

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It’s counter-intuitive that such a change is not listed in the change-log. It’s a breaking change after all, since API trading clients depend on the filter information.

Where are such API changes reported/announced instead?