[syslinux] syslinux issue - vga font affected after splash

[Михаил]

My syslinux.cfg:
==========
FONT russian.psf
DISPLAY help.msg
F1 help.msg
F2 boot.msg
...
==========
File help.msg contents info on russian. File boot.msg contents some info and
splash stuff.
When booted I see info from help.msg, then I press F2 and some splash
picture appears.
But if I press F1 after that I can't read any, cause vga font affected or
not loaded.
(There is ASCII 25 symbol at the top of help.msg )
I think .psf file have to be rereaded when returns from graphics to text
mode but it not.