combine registered var

[daeme...@gmail.com]

I use ansible with win_updates to install windows update.

To get all updates installed I do multiple loops with a reboot in it

I do set the contents in a register.

But a reboot overwrites the register

How can I the register vars from multiple time to one var.

The contents is a dic
 I tried something like this

my_strings: "{{ my_strings | default({'key':'value'}) | combine(available_updates.filtered_updates, list_merge='append') }}"

But I have one result in it