Receiving SQS Messages seeing a different behaviour in my test between localstack version 1.0.3 vs 1.0.4

Hi, I have a test to retrived and verify the SQS messages triggered after an event, with Localstack version 1.0.3 i am receiving all the expected sqs messages, however from v1.0.4 one of the message is missing to retrieve.
Expected size: 9 but was: 8 in:

Is there any specific changes related to sqs messages between these versions and any idea to fix this issue?