From Canon USA:
An incorrect battery charger (LC-E17) may be included in some M50 EF-M 15-45mm IS STM Kits.
We would like to offer our sincere apologies to users who have been inconvenienced by this issue.
Support
If you received the LC-E17 battery charger in the EOS M50 EF-M 15-45mm IS STM Kit please contact our Customer Support Center, using the information below. Canon will replace the LC-E17 with the correct battery charger, LC-E12, free of charge.
This information is for residents of the United States and its five territories only. If you do not reside in the USA or its five territories, please contact the Canon Customer Support Center in your region.
If you have not already done so, please register the EOS M50. By registering, we will be able to notify you via email about future announcements.
Knowing both chargers (LC-E12/17) from my 100/200D cameras they look quite similar. But the thicker LP-E17 battery needs a wider charger compartment.
The LP-E12 would fit only quite loose and shaky with no good electrical contact into the LC-E17. :unsure: