On 21 May, a viral post shared by Sinhalese and a few local news companies claimed to show Muslim restaurant staff cleaning crockery in dirty drainage water. After being shared and viewed tens of thousands of times, the footage was subsequently proven by Agence France-Presse to be a foreign video from 2018.
https://factcheck.afp.com/no-video-does-not-show-restaurant-workers-sri-lanka-washing-crockery-dirty-water