I was messing around with command blocks when I found out that the "execute" command doesnt affect comparators, not even if the command was succesful.

Command:
execute @p ~ ~ ~ setblock ~1 ~2 ~ air 0 replace
The command is succesfully executed, the block is removed but the output on the command block is:
[01:34:46] Failed to execute 'setblock ~1 ~2 ~ air 0 replace' as Mato_Lynz