Hey @v-jefferni ,
Thank you very much for your reply. Please refer to the following steps to reproduce this bug:
1. Create a new Canvas App.
2. Enabled Modern Controls and themes in App Settings.
3. First insert a vertical container, and set the following properties for the container:
Width: Parent.Width
Height: Parent.Height
LayoutAlignItems: LayoutAlignItems.Stretch
X: 0
Y: 0
4. Insert a Modern Textinput control and a Modern Table control into the Vertical container.
5. Bind a Dataverse table to the Modern table control, and then set Flexible height property to On. If configured correctly, it should look like the screenshot below:

6. In my environment, I am binding a table named Account. You may bind other tables, and then click the Modern table control to modify its Items property to the following expression:
Items: Filter(Accounts, StartsWith('Account Name', TextInputCanvas1.Value))
7. Click the Preview button to preview the app, and enter any characters in the Text Input control to filter the table. you will see this bug, the table control is not refreshed correctly.

8. Now that you could set the table's Flexible height property to Off, the table works as expected.