Lost data

What I did:
i always edit my agenda on my iPhone, but i will review it weekly on my iPad(wifi iPad).
What happened:
when i connect my ipad to wifi and open my agenda app, my notes sync and it refresh my note into my last week notes, so basically my whole notes on the week is gone (my iphone sync following my iPad, not my ipad sync following my up to date on iPhone)
What I expected:
it sucks because its a work thing
Things that might be helpful to know (Agenda version, OS and model, etc):

I have a feeling the sync is just slow. Can you try leaving both devices connected to power, with Agenda running? Maybe the sync will catch up, and the new data come. (Agenda has a complete history of the data, so just because old data is showing doesn’t mean the new data is gone; it could just be slow to arrive.)

Kind regards,