Dotween frame rate declining.

I am having sustained frame rate drops when tweening UI.

I am making a game purely in UI. No 3d-meshes, no sprites. I've been using Dotween to animation the UI, but when I do a bunch I notice the rendering (everything) increases. I'm wondering if anyone has any experience with this.

This code sample basically gets all the cards and lets them do a dance. Think finishing solitaire.

 public async Task Celebrate()
         {
             UCard[] cards = GetCards();
 
             Vector3[] pointPath = path.Select(transform1 => transform1.position).ToArray();
             foreach (UCard uCard in cards)
             {
                 uCard.transform.DOPath(pointPath, duration, type, mode, res);
                 await Task.Delay(10);
             }
         }

The profiler shows frame rates not returning after each "Celebration". The steps in Rendering are when celebrations are triggered.