Digital oil level issues?

[cocog]

Had an oil leak which had level dropping and having to top up. Level going up and down as expected.

Got oil leak fixed from timing cover seal and changed oil at same time.

Level showing max on scale and drive it for a week and no change in level.

Then got the warning level up needing litre top up.

Checked car over and no oil leaks. Topped up the oil a bit and it has reset itself.

Has anyone had strange things like this happening in case it is maybe an issue with oil pressure which reads into this level.

Anyone had things like this