This is Produce/Director Yoshida.
We have confirmed reports of the changed behaviours of turn 2/5. Sorry for late report.
The dev team was working on 2.2 as well as bugfixes in parallel. The current changes are the unintended consequences of some of the bugfixes applied in 2.16.
We are looking into how we may revert turns 2 and 5 to their previous behaviours, and will apply a hotfix as soon as we can. (fix for XHB input delay will be included in the hotfix).
I will explain in a later post, the changes that caused this behavioural changes.
It is against my principles and beliefs to apply a stealth patch/nerf as so many people are calling it (because it would be discovered immediately anyway and has no merit for uss). There have also been other mistakes like this, including mistakes/missing items in the patchnotes which lead to such a situation, and I apologise for them.
Translated crudely from Japanese. Sources all contained with the reddit.