Github user emilianbold commented on the issue:
https://github.com/apache/jmeter/pull/300
> A third one is the following: [...]
> Search something
> Redo => Nothing happens => KO
setMarkedBySearch is called on JMeterTreeNode not on some model class like
TestElement. So, it's never actually saved by the undo/redo mechanism. Undo
clears the node because it does a refresh actually, it doesn't save/restore the
flag at all. The current design doesn't take this situation into account.
Performance could be fixed by coalescing.
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