the command block shows the output in chat maybe it's because I'm using the execute command to find local entities nearby and summon near ontop of them. 1.12 btw.
Issue comments
I have tried to replicate this and was not able to. Please provide your workspace.
When possible, include your MCreator workspace (or even better a minimal example workspace required to reproduce the bug), game crash logs (full logs, do not crop them, in text format, not screenshots of logs) from the Console tab or terminal and steps to reproduce the bug in your workspace. Please specify which mod elements to check in your workspace too, if applicable.
https://i.imgur.com/VatjKDN.gifv it only happens when gamerule command block output is true as well (which it is by default)
Related: https://mcreator.net/comment/110982