For android it was a backwards incompatible, undocumented API change [0]. For windows it just looks like the UWP API is complicated enough that you can footgun yourself. For ex OpenAsync+DataWriter would do it as the default behavior [1].

[0] https://issuetracker.google.com/issues/180526528

[1] https://stackoverflow.com/questions/35842374/how-can-i-overw...