Why does Bitrix display scribbles in the first characters of Cyrillic strings?

Question

HTML

If everything is fine in the ftp code editor, then this is nonsense on the frontend:

I edit in the visual editor (which is inconvenient), everything becomes normal on the frontend, but now it gives out nonsense in the ftp editor.
A month ago, such a problem got out with another page. Then it seemed to be decided by bringing the page file and the header / footer to a single encoding (ansi). At least I remember that I decided that this was the reason. This time, the reduction to one encoding did not solve the problem. The cache updated both Bitrix and the browser.

Answer 1

It seems that this time it was decided for sure - the file opened in ansi_x3.110-1983, although it was encoded in windows-1251. When manually changing the opening encoding, the file opened normally.
Why editors mistakenly determine the file encoding - the question remains open, but this is no longer critical.
/* Problem solved. Created a new file via ftp and copied the code into it.*/

Answer 2

Bitrix pages are just php files, without any tricks. If the built-in editor works with them correctly, but the third-party one is weird, then the problem is with the third-party editor.