Maybe it is just me, but since the 10.3.3 update, the project is now inserting artifacts that are not on the original...
It seems that there is a tiny issue with the alpha channel, or overwhiteness.. But after the update I checked my project and there is a new tiny black artifact that is not in the original video, but is there after I import or drag and drop...Strange!
Wow. This release is slow. Something about the new audio rendering scheme. I used to be able to whip around the timeline no sweat. Now it spins the rendering throbber and there are no waveforms for over a minute. Ugh. Other stuff not snappy anymore.
Bug in german version: colorboard titles (Color, Saturation, Exposure) keep disappearing. The pucks then also only show their outlines. I occasionally use Language Switcher, doesn't happen in english version. Changing the order of effects in inspector used to be laggy, seems to be worse now. Has this to do with the flexible width of the inspector? New colors for roles are almost indistinguishable from existing ones (apparently six more?). But I understand that - for instance - pink, bright blue or yellow would look shrill and not meet the design standards of Apple. They should have used emojis instead, as Sam Mestman suggested. You don't need 18 colors if there are little symbols to help identify the nature of the role.
The Colorboard titles disappearing has been happening since 10.3 was introduced (same with the names of imported files and whatnot in the Browser disappearing). This is clearly not a bug they are interested in fixing. Or maybe they don't know how to fix it?