This problem was not real for a while, it just happens so often at random moments, nothing changes. I also do not know how to reproduce the problem, but I will give a detailed explanation of what is happening.
Normally, the importRange function works just fine and looks something like this:

Correctly printed table text. I used this strategy on Google Spreadsheets for a while.
Each time, as a rule, Google Spreadsheets seems to break, or at least the importRange function does ... and produces something like the following:

Google seemed to freeze from time to time, and this is happening. I tried setting importRange parameters to! X1: X ,! X2: X5 by changing the title of the imported sheet, etc.
In the past, the transition from X: X to! X1: X fixed some columns, but not always all of them. The only reliable solution to fix this that I found is to recreate both tables. Since the source code (the one that is imported) ultimately becomes a report, I would like to save my boss from the extra effort associated with several spreadsheets, and most likely fix it and do it.
Does anyone know the potential cause of this disruption? Sometimes he corrects himself, sometimes it is not. This happens randomly, and only for some spreadsheets (I have a set of 8 or so that everyone uses importRange , and at the same time no more than 2). Therefore, I honestly do not know where this comes from.
Side note . Google as a whole today does not respond a little to the requests of all its services - my mail service in App Engine for Google Apps has decreased by about half an hour. Can a resource / network attacker restriction cause this behavior in tables?
Refresh . I tried to import Tables from the same table into the same data (i.e. I gave the importRange function a different spreadsheet). Although the key and range are valid if imported into another table, in my original (one full #REF!) This range is imported incorrectly. This makes me think that this failure can only apply to one Table, where any attempt to importRange from any other source does not work .