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TL494: TL494 unstable question

Part Number: TL494

Hi Support team 

my customer used TL494CDR in  push pull application.
In theory, the MOS on both sides will switch in turn, and the duty is the same,
But the problem of switching twice in a row suddenly occurs, as shown in the figure below, the green is MOS Vds, and the yellow is MOS Vgs.

Have you ever encountered this problem? How to solve it?