problem with tags title

[sherif1967]

i have a problem with tags title, and it's not my own problem it's on all vbulletin 4 versions i have checked alot of vb4 forums and they are have the same problem .
the problem is tag title is not showing in the search engine or in browser title bar only i got " Search Result - Forum Title "
is there is a solution for it problem ?
i have tried to edit search result template with an condition to fix my problem but its only showing forum title .
original code :-
<title>{vb:rawphrase search_results} - {vb:raw vboptions.bbtitle}</title>
my edit :-
<title><vb:if condition="THIS_SCRIPT == 'tags'">{vb:raw thistag.tagtext} - {vb:raw vboptions.bbtitle}<vb:else />{vb:rawphrase search_results} - {vb:raw vboptions.bbtitle}</vb:if></title>

btw the tag search template is only have this code
<vb:comment>obsolete</vb:comment>
and i got the same problem in vbulletin.com when i'm searching for a solution for it .
problem in Tags page title (https://www.vbulletin.com/forum/forum/vbulletin-4/vbulletin-4-questions-problems-and-troubleshooting/4313676-problem-in-tags-page-title)

sorry for bad english