since the last update, the addon no longer gives the renown quests completely. You have to click once more each time

I have test it now with no other Addons. Dont work.
I use the German client

Tested the trophies quest on German client and it seems to work fine. Do you see any errors? I imagine when you tested it with no addons, you disabled addons and that quest was the first one you tried to turn-in?

Do you have an example quest name or link?

Yes :)
https://www.wowhead.com/quest=70929/more-hunting-trophies > the 5 and 20 piece Quest dont complete automatically

https://www.wowhead.com/quest=72876/multiple-dragon-isles-artifacts > Same here....

https://www.wowhead.com/quest=70841/more-titan-relics
this Quest works fine

The hunting trophies quest and the dragon isles artifacts quest both seem to work fine for me. Which part does it get stuck on? The Continue window or the Complete window or both (or something else)? If you /reload your UI just before interacting with the NPC to turn in the quest, does that make any difference?

Both stuck at the continue Window

Dont see any errors.
Yes, this was the first quest after i disabled all addons

The only real change made in the last update is that when you interact with a quest turn-in, LTP checks to see if the the quest requires an account-bound item. If it does, it doesn't turn in the quest and it halts at the Continue and Complete windows. But the required items in the quests you listed are not account-bound items.

Please send me an email so that I can send you a file.
The email address is on https://www.leatrix.com/ (look under the Support section).

Thank you for the information that you emailed.

So the quests that you linked require items which are available as both Bind-on-Pickup and Bind-on-Account. Quests that require BoP items will be turned-in automatically. Quests that require BoA items will not be turned-in automatically. This is because you may want to send the BoA items to your alts so it would not be a good experience to casually interact with an NPC and have all your BoA items disappear.

The 'Automate quests' option won't turn-in a quest automatically if it requires gold, a currency, a crafting reagent or a Blizzard account-bound item.