Okay, it seems it’s not affected by Purge Cache plugin. I have tested using a new Text Block and then copied and paste this specific code into text editor tab when editing Text Block on a page then when I switch to visual editor, this piece of code disappears. It won’t save. This is what I’m talking about.
May I suggest that you try logging in again and test this piece of code by creating a new page and then add a new Text Block onto this test page. Then try to use this code that I tried to save below into text editor and then switch to visual editor and see if you have same issue as I do.
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Thanks.