There is a strange bug when you add a custom cache key with multiple single underscores. It took me ages to track it down so hopefully it will help someone else.
The following cache key works: EXAMPLE_ONEUNDERSCORE__TWOUNDERSCORES
However, this one doesn't: EXAMPLE_ONEUNDERSCORE_ONEUNDERSCORE
There seems to be something strange going on with the underscores when you have more than one single underscores.
There is a strange bug when you add a custom cache key with multiple single underscores. It took me ages to track it down so hopefully it will help someone else.
The following cache key works:
EXAMPLE_ONEUNDERSCORE__TWOUNDERSCORES
However, this one doesn't:EXAMPLE_ONEUNDERSCORE_ONEUNDERSCORE
There seems to be something strange going on with the underscores when you have more than one single underscores.