The same callstack appears in 4.24.3 (CL-11590370) but only when playing a Sequence with a Media Track that has a ImgMediaSource and Media Texture set on it. These repro steps work for 4.25 and 4.26 since the crash is triggered earlier.
This was tested in 4.25.1 (CL-13594126) and reproduced in Main 4.26 (CL-13653677)
Results: The Editor crashes
Expected: The Editor doesn't crash
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-94563 in the post.