Had this too, started in about 1.05 I believe.

However in 1.05 it happened only with sovereign , now with all units.

First I was thinking I am not clicking careful (exactly) enough on the enemy, but later I noticed that it's enough to wait.

It goes like this:

You have action points for several strikes, the first one is OK, enemy strikes back (or not) but for (before) 2nd and others you have to wait loooong time.

May be the problem is in retaliation (enemy unit strikes back) code, or with the code that "selects" my unit again after enemy retaliated.

Also I had a feeling if you click on your own other unit (try to select it) the wait is shorter, but this might be self delusion

Not THAT longer, I might accept a second or even two, not 5-15.

Also sometimes it happens, sometime - does not.

(But "sometimes" I mean in some tactical combats. Also it not always starts from the start of the combat , but once it starts it happens until the end of the combat, and please note that it happens only when/after stryking, not when moving)

That sounds right for what I run into also.