+1, this bug is super confusing and has caught me out several times just in the last 2 days of using zabbix.

this seems to be the top usability issue in zabbix for many years. just now from irc :

<modem_> I am trying to link Template to my second zabbix host but it won't work, I mean the "select" and "add" function won't add anything, and no error neither
<volter> modem_: Did you click the "Add" link?
<modem_> This is working Thanks a lot
<lamba> modem_: that trips me up once a week, every week.

The dialogs for copying entities and trigger dependency are different too. The later is super-annoying to use, as it keeps forgetting everything.

A couple of screenshots "before" and "after" would be great. And at least some explanation of what has been done.

dimir, removed multiselect. Now used popup. By analogy how in triggers dependencies.
Before:

After:

rlataria, great! Thanks a lot!

Fixed in:

• 4.4.0beta1 586bc348b0c

I'm sad to see the "type here to search" feature gone  It was way easier and quicker to search than browse.

As Arli sad ... the "type here to search" feature is missing in the new popup  

I would suggest you to put a vote on this task: ZBXNEXT-5473

Just to recap:

• We added a multiselect field for template linking in 2.2 (many multiselects were gradually added starting with that version)
• This ticket asked to remove the extra 'Add' step (inconsistent with other multiselect fields)
• We removed the multiselect field instead, effectively going back to a pre-2.2 state
• Now we are dealing with another ticket asking to put a something like a multi-select back (ZBXNEXT-5473), even though we just removed it ourselves

Heeelp! The logic here is getting hard to follow.

On top of that the mass update still has a multiselect field and the "type here to search" string. Although the "typing to search" seems to work no more, for template mass update (works for host mass update).

Why did you guys implement it this way? Please enlighten why yet another UX regression is added by requiring more clicks to already crippled template linking since removal of twin boxes?

You pushed so hard to add assistive technologies and keyboard navigation to 4.0. Now try linking a template in 4.4 just with the keyboard. 

And you can't add/remove hosts from the template in Configuration -> Templates section either, which is particularly annoying when developing new templates. The number of extra steps required for linkage is immense. And no, don't even try mentioning mass update here, as it still is complicated if you can't have all hosts in one filter selection for the update operation.

However, you can't annoy your users more than asking for votes on a feature which you broke on purpose and then make users wait forever because see the feature request has not enough votes to bring it on the radar. 

Please follow on ZBXNEXT-5473

Updated documentation:

• Host configuration (diff)
• Template configuration (diff)
• Upgrade notes