When using the /effect command in either a command block or in the chat command, the option to hide particles does not seem to work, as it still shows potion effect particles
Linked issues
duplicates 1
Comments 3
Yeah, remember it is "hideparticles: true" (not showparticles) to hide particles of any potion you must set it to "true."
This issue was already reported in MCPE-21890, so this is a duplicate of MCPE-21890.
This is because you have to type "true" at the end, not "false." It will hide the particles once you put "true" at the end.