We have achieved "legal contributions level 1" some days ago. I spend 5 crowns and 10 crowns. After restarting the game the research points are reduced by 1.
I found this bug 2 days ago. yesterday i could confirm. Today i recorded the donations and take a screenshot after restart.
This issue is still actively under investigation and I don't currently have an update, but you can write Customer Support to review your Alliances research points until there is more news.