SUMMARY "After calling "Reset all channels" on a transform mask, the layer content disappears. Making the mask invisible shows the content, and making the mask visible hides the content again. It looks like there is something wrong with returning It looks like after returning all the keyframes the channels are returning bogus values instead of identity transformation." - Dmitry
I've been having issues reproducing this. It seems like the transform mask will translate to the "origin" transform that was applied before keyframes were added. There have been cases where artifacts occur during channel reset however, so there might be an error somewhere in the visibility estimation. I'm going to mark this as works for me though, as reproducing the bug where transformed content becomes invisible doesn't seem possible.
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This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!