These things are usually circumstantial. It all depends on your activity. It may also be in response to someone -blam!- you. Did they give you a timeline on when it's lifted?
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No such thing. Not even prior notification. I had a hunch and requested removal of restrictions. Their response was no; do not pursue the matter; if you do further restrictions will be applied. I do not think any complaint was made. I do not use the site for religious discussion or debate. I have zoom, facebook and youtube for that.