Module upgrade config_(lang).xml PS 1.6

[czerstwyjurek]

Hey guys,
I have a problem upgrading my module in prestashop 1.6.x.

what i do:
- upload modules new version via "upload module" in admin back office
- constructor of module's main class has $this->version set to new version (let's say 0.0.5)
- upgrade folder has a file upgrade-0.0.5.php with function upgrade_module_0_0_5 inside

The problem:
Everything works as expected on prestashop 1.7.6.4, but on 1.6.1.24 update happens only when i change version number in config_(lang symbol).xml to <version><![CDATA[0.0.5]]></version>, or delete the file.
What am I missing here?