option length exceeds option buffer length

[Denis Taranushin]

Hello
I have a lot of errors in logs looks like:

Subscriber-ID: SV869_CV1549 HWAddress 3c:97:e:a5:83:20
DHCPREQUEST for 1.1.1.10 from 3c:97:0e:a5:83:20 (Lenovo-PC) via 1.1.1.1
DHCPACK on 1.1.1.10 to 3c:97:0e:a5:83:20 (Lenovo-PC) via 1.1.1.1
parse_option_buffer: malformed option ttk-su.<unknown> (code 104): 
option length exceeds option buffer length.


At that moment string "ttk-su.ru" appears  only in DHCPACK:
OPTION:  53 (  1) DHCP message type         5 (DHCPACK)
OPTION:  15 (  9) Domainname                ttk-su.ru


Why "option length exceeds option buffer length"?
Why the error appears only for some client and doesn't from others?