Slug and Module::isEnabled() error

[svv-name]

Hello, after some updates I found, that slug of all my modules was change to lower case (it was adminBlog, became adminblog), but in module.json it still adminBlog. Lower case return function Module::slugs();. Before last updates all work nice (in CamelCase).
If I try to check the module is enabled (Module:: isEnabled()) then get the error:

ErrorException Undefined index: enabled

Photo

[svv-name]

after rollback from dev to 4.2.2 all work fine