fix: fix blockchain stop to produce blocks

[forcodedancing]

Description

Fix blocking issue.

Rationale

https://github.com/cometbft/cometbft/blob/main/spec/abci/abci%2B%2B_basic_concepts.md

[ProcessProposal:](https://github.com/cometbft/cometbft/blob/main/spec/abci/abci++_methods.md#processproposal) It allows a validator to perform application-dependent work in a proposed block. This enables features such as immediate block execution, and allows the Application to reject invalid blocks.

CometBFT calls it when it receives a proposal and validValue is nil. The Application cannot modify the proposal at this point but can reject it if it is invalid. If that is the case, the consensus algorithm will prevote nil on the proposal, which has strong liveness implications for CometBFT. As a general rule, the Application SHOULD accept a prepared proposal passed via ProcessProposal, even if a part of the proposal is invalid (e.g., an invalid transaction); the Application can ignore the invalid part of the prepared proposal at block execution time.

Example

NA (keep un disclosured)

Changes

Notable changes:

• NA