Preconditions (*)

1. magento 2.3.4 (Reproducible on 2.4-develop)
2. a product has tier price

Steps to reproduce (*)

1. setup a shipping cart price rule for the product to apply fixed amount discount for tiered price.
2. apply a "price in cart is...(equal to the tiered) price" condition to cart item under "Apply the rule only to cart items matching the following conditions (leave blank for all items).."

Expected result (*)

1. Correct discount amount can be applied to the tired price
2. It is working well in Magento 2.3.3.

Actual result (*)

1. After upgraded to Magento 2.3.4
2. System seems cannot check "price in cart" condition; may apply discount out of the "price in cart" condition; may apply wrong discount amount...

Additional info from Engcom

Steps to reproduce:

1. Setup cart price rule with the following conditions
   
2. Go to frontend and add corresponding products to the cart
   
3. Proceed to checkout

Expected result
Correct discount amount applied

Actual result:
Discount not applied, 'Price in cart' condition doesn't work