Ok, you know not knowing the English language and trusting me
only to the google translator, things remain a bit difficult for me!
So for everything, always going to translate, it's a bit complicated.
Regarding point 1, I refer to the Find Object window.
This happens: I search for an object, after finding it I click OK,
but if afterwards I go to look for another object, the OK button is no longer available.
You cannot click and to avoid the problem, I double click on the name.
I believe this is a small bug.
Yes, a screen recording would help. I just tried what you described multiple times and the OK button worked every time. There must be something else going on.
The above behaviour happens when you connect to much older indilib versions, I have compiled the latest one as in 1.8.7 and I cannot replicate the issue.