this has happened to me twice where i would find a stronghold and it would have a few rooms but no strongholds and i dug around the walls but there was no portal room and when i went on creative on a copy of the world i use ender eyes but they would just lead to a oart of the room and not the portal room.
Thank you for your report!
We're actually already tracking this issue at MCPE-19426, so I will resolve and link this ticket as a duplicate.
That ticket has already been resolved as working as intended, which means this is not considered a bug and won't be fixed. Please do not leave a comment on the linked ticket.
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