First of all it's not clear from start post that you're using add-on.
Secondly you definitely need to post bug request to developer of this plugin.
I mean, when I try to do a global replace using:
https://marketplace.atlassian.com/plugins/at.rumpelcoder.confluence.search-and-replace/server/overview
and I end up getting
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What you mean by replace? Replace same piece of content in different spaces?
I'm using API to do this: get current content, increase version number, post updated content.
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