unexpected "cannot find reference" when accessing dict in Pycharm

Hi,

When creating a dictionary with embedded dictionaries and later adding a list to it, Pycharm "cannot find the reference" for this item's list functions

Minimum example code:

d = {"a": {}}

d["b"] = []

d["b"].append(1)

Code inspection for this example shows "Cannot find reference 'append' in 'str | dict'" (even though it works obviously)

Is this intended?