Niantic in an official blog post has stated that they will be releasing a fix for an uncalled bug pretty soon.
This bug is causing the Stardust amount to powerup a Lucky Pokemon higher than intended.
Trainers, we are aware of a bug causing the Stardust amount to power up a Lucky Pokémon to be far higher than intended. We’re working on having a fix out soon, and will update when the issue is resolved. Thank you for your patience.
— Niantic Support (@NianticHelp) May 14, 2019
Niantic has took it to Twitter to share this news with the public. With the recent update 0.143.0, many players are encountering few other bugs which is hampering the gameplay and experience of the players.
But as Niantic is consistently trying to resolve the bugs as early as possible.
Currently, Detective Pikachu movie themed event is live for the game which has brought a range of new tasks & rewards. The event started on May 7th and will end on May 17th.