Hello, every time I break a block of my house it harvests my house. Normally, this wouldn't be an issue, but it does it when I am not sneaking. I went into the config settings in-game to see if anything would be causing it but I didn't find anything definitive. Even if I am not sneaking (And I made sure that "Tree harvest without sneak" was off for Tree harvester, as well as set OreExcavation to sneak for excavation, via keybind and config) it harvests trees, as well as any structure I make out of logs. The weird part is that this issue only seems to happen if I am using vanilla logs and vanilla tools. This issue doesn't occur on non-vanilla trees or if I am either using modded logs and a vanilla/modded tool (or) modded tools and modded/vanilla logs.

If I sneak while breaking a log structure, It doesn't harvest the structure, So it seems that it is backwards in the sense that it works if I don't sneak and doesn't work if I sneak.

I tried changing "Tree Harvest without sneak" to on/off; as well as turned Ore Excavation off by changing the value to -1 via config, just to see if that would maybe fix it; however, nothing seemed to solve it. If I can think of anything else I will update it here.

I know that reading this is probably hard to understand, since I am terrible at formatting paragraphs so:

Here is a Gif, since visually seeing it happen may help:
https://media.giphy.com/media/chg8jvDtxw0xFvt0Oy/giphy.gif

A link to the tree harvester bug forum that I made earlier this week, as I thought that was the mod causing it; until we came to the conclusion that Tree Harvester was likely not causing it:
Serilum/.issue-tracker#921

As far as I know, the tree harvester mod is the one that leaves behind saplings. I'm not sure of the specific mod or config but my theory is that if you harvest a log that is placed facing downwards onto dirt, it automatically mines the whole tree- in this case it thinks your house is a tree...

Author of Tree Harvester here,

as seen in the gif the amount of time it takes to chop down the log is very much increased. TH doesn't actually change the speed of the log broken, which makes me pretty sure it's another mod that's active. TH also has a check for leaves around to make sure it's a tree that's being broken. @Xesxx doesn't have any leaves in the house.

I found this mod on forge. it is not listed under atm7 but works exactly as described by OP and by the gif.... Interesting.

"Tree Chopper is a simple mod, which allows chop down whole tree. The only thing you need to do is break the bottom block with an axe.

Stop breaking the tree block by block! Just destroy bottom the of trunk and the whole tree will chop down..

Tree Chopper is universal (clientside and serverside). (Since 1.2.0 can be used as serverside mode, but clientside is recommended - because of non-synchronous visual breaking.)
Supports mods (e.g. Biomes O' Plenty).
Can be deactivated by holding SHIFT.
Config with settings and list of allowed axes and types of wood.
In-game commands. Type "/tch help" for more info
Option to reverse function (chopping with SHIFT)
Option to disable shift function"

Reap Mod in ATM7 has the similar function.

https://www.curseforge.com/minecraft/mc-mods/reap-mod

Optionally you can enable tree harvesting in the config.

If you break the bottom log of a tree while not sneaking, the whole tree will be harvested.

When I checked the "reap-server.toml" file in my save folder, I found these lines.

#If the tree harvester should be enabled
enabled = true

I think I hadn't changed these settings before, but it seems the settings of the Reap Mod had changed somehow.

After I changed the Reap's setting from true to false, my Steve won't cut down the tree without sneaking.

But with sneaking,
my Steve is able to cut down the tree when he breaks the one log of the tree
and he placed the sapling automatically.

(Sorry, if my English or explanation is bad. I'm not a native English speaker)

My friend, you have solved the problem. I hope OP can see your answer soon. You hit the nail on the head! Bravo.

Tree harvester has been removed in dev so hopefully no one else has this issue after the next update

Tree Harvester wasn't the problem here though 😇

Harvest speed was changed in gif, which isn't what the mod does. There are various checks active to prevent house from being broken accidentally.

As @tomy-cc found seems like it's a Reap config issue.