issue with Retrieving Stored Messages on Pubsub Topic for Shard 8

[AYAHASSAN287]

Issue Description

While running the test TestStoredMessagesWithDifferentPubsubTopics, the last pubsub topic, which belongs to shard 8, does not work as expected. Messages published on this topic are not being retrieved when querying stored messages from the node.

Expected Behavior

• Messages published to all pubsub topics in the test should be successfully stored and retrieved when queried.
• The test should pass without errors, confirming that all topics, including shard 8 (/waku/2/rs/3/8), function correctly.

Observed Behavior

• Messages published on the last topic (/waku/2/rs/3/8) are not being stored or retrieved.
• The test fails when querying messages from this topic.
• Other topics (shards 0–7) work as expected.

Steps to Reproduce

1. Run the test TestStoredMessagesWithDifferentPubsubTopics in store_test.go:

   go test -run TestStoredMessagesWithDifferentPubsubTopics