ASINs suppressed violating Amazon title guidelines - June 18, 2019

From July 22, 2019, Amazon will suppress ASINs from Amazon Search whose titles do not comply with Amazon’s product title requirements.

This is because our research shows that the ASIN titles that violate our policies result in poor customer experience. Please review Amazon’s Product Title requirements prior to July 15, 2019, to verify that your current titles meet our guidelines.

Reference: FBA product title requirements(Login required)