Help - Page History Gone - Again.

Help - Page History Gone - Again.

I use one page on a daily basis for my to-do list. Last night, I needed to revert to a prior version because I deleted a column in a table and I need that column back.

I go to version history - and nothing shows up (after watching the loading circle). I

The page info states the page was created 5 months ago.
Other pages have version history with options.

What do I have to do to have reliable version control?
Is there a limitation of time for version recovery?

This is the second time Nimbus dropped the ball in a clutch moment for me.
This is not an end-of-world issue, but damn it's infuriating.