not sure if it's a bug but there seems to be a 35 character limit in domain name when adding a new host

[NorthernMunkey]

when putting in the cname.domainname.co.uk and the total is over 35 characters then the text box hangs and doesn't recover.
is it a bug? limitation or designed that way?
thank you

[NorthernMunkey]

i have found a way round it, but it's definitely there if you type it in the normal way, type the last part of the domainname.co.uk then click to the front of it and put the cname. in