Hi, we have a template applied to lots of host (more than 1000):

zabbix=> select count from hosts_templates where templateid=10078;
count
-------
1004
(1 row)

We tried to add a macro to the above template but as soon as I click "Update" the page is reloaded and all the existing macros are cleared, Linked templates are cleared and Template name is cleared as well (see screenshot)

Same behaviour is triggered if I try to add a new linked template

Reloading the page "restores" the original configuration: I have the old macros and templates linked.

I have no errors in the webserver logfiles

I cannot clone the template (same thing) but I managed to export it, edit the name in the xml and import it again.

In the new template not linked to anything I can add and delete macros, template ecc