Keyframes deleting themselves on Gain/Volume filter

[kagsundaram]

@Wesley_Swank

• Create a series of keyframes for the Gain/Volume filter on an audio clip. Save and exit the program.
• Open the file. Select the clip, flip to the keyframe tab, and attempt to manually edit the gain/volume on that key by selecting in the gain/volume text box and hitting Backspace.
• All keyframes will immediately disappear. Reactivating keyframes shows that they have all been deleted.

This is a very clear and concise description of the problem, @Wesley_Swank.

Fortunately for all of us, this problem has been fixed in the Beta-Release 21.02.15, and will soon be in a production release of Shotcut.

@kagsundaram

Five hours of continuous use later, 21.02.15 is still looking good.

• Reproduced the sequence which caused the loss of Keyframes on the Gain-Volume filter. Keframes stayed, as they should.