Send only if value changes does not work

[webfrank]

Hi, I upgraded from a very old version of zigbee2mqtt and nodes and now, even with cache_state: false in configuration.xml, I receive all the states from the devices. I tried the flag "Send only if value changes" and it doesn't work. Looking at the code the check with the previous value is done using the full payload, including linkquality, which changes. To really filter out the same messages I think linkquality (and any other similar fields) should be excluded from the check.

[andreypopov]

works good for selected property, not for all I agree, that it can be improved by properties multiple filter

[S474N]

Same problem.

If full payload, there is problem with no filtering.

If for example Homekit/Switch, there is everything ok.