Hi @Anonymous ,
Do you have delegation warning like this?

If so, what you met should be a delegation problem.
If not, could you tell me you put your formula in which control's which property?
How to deal with deleagtion problem:
Does 'Личный кабинет' allow multiple choice?

If 'Личный кабинет' not allow multiple choice, it will be more easier.
Just use this formula :
Filter(ППР, User().Email = 'Личный кабинет'.Email)
If 'Личный кабинет' allows multiple choice, could you tell me how many records in your list?
If it is 500~2000, you just need to change the non-delegation limit to 2000:

And you could still use this formula:
Filter(ППР, User().Email in 'Личный кабинет'.Email)
If your record number is more than 2000, it is a little complex.
"in" can not be delegated in powerapps when using sharepoint list as data source.
I suggest you save your list in collection and then filter based on this collection, because in collection there's no delegation limit.
Or you need to consider modifying your formula to only use delegateable functions.
Or else you will get wrong result, for example only the first one in your issue.

Here's a doc about delegation problem for your reference:
https://docs.microsoft.com/en-us/powerapps/maker/canvas-apps/delegation-overview
Best regards,