Translucent blocks like stained glass are rendered after the block break layer and lead to the block break effect being put under the texture of the block. This issue is especially noticeable with resource packs that make these blocks less translucent and mods that intend to add blocks that are translucent.
Attached is a video that demonstrates this issue with the vanilla white stained glass block.
This report is invalid as your game was modified when experiencing this issue. In the attachments you've provided, I can see that you're using modifications and the bug tracker only handles reports that can be reproduced in a vanilla environment. If the problem persists without the use of mods, feel free to create a new report. Additionally, please see the Bug Tracker Guidelines for the minimum standards when submitting a ticket.