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Do not (automatically) expand URLs that have been recently, previously expanded (in the same channel) #3020
Some bots repeat the URL that was sent (or minify it, to help terminal clients), leading to the same link being expanded twice in a few seconds.
I was thinking the server could check last X messages in the channel to find the same link and set
If different links redirect to the same ending link (like your text example with bit.ly), that will be more tricky.