Problem:  It rains on my world, but it never thunderstorms!  We have been trying to use the Channeling enchantment to get mob skulls!  There is rain normally, but no lightning!

World Statistics:  Our world originated on Xbox One Edition and was migrated when Bedrock was first released.  Since then and now, the weather was working normally.  The world is Survival only existing on a Realm.

Suggestion:  I'm wondering if the old "preserved chunks" from the original world are missing thunderstorms?  I haven't checked if "new chunks" from newly generated territory have lightening or not...  I don't know if there is any difference between the old chunks and the new chunks regarding the weather issue.  BUT, the weather did work with lightening and thunderstorms originally, but we noticed there is no more lightening as of recent.

Thank you!