Problems with WordPress permalinks?

Question

WordPress

There is a poll plugin, so when the poll is completed, if the permalinks contain a standard permanent address like this test.ru/2018/05/26/sample-post/, then everything works fine, the url of this kind exits at the end, test. ru/test/test2/doing-form where test2 is the name of the survey itself, if the permanent address does not end with the standard address, namely the permanent address must end with sample-post/ or %postname%/ with a slash at the end, an error will occur, about a non-existent page, and the name of the test falls out of the url, it turns out like this test.ru/test/doing-form, my permanent address at the moment looks like this http://test.ru/%category%/%postname%.html,I will be very grateful if you tell me in which direction to move.