Mark sharp goes off at random edges while merging loose vertices

[Captain Toof]

Some of them is afferced and just at various places of the mesh. Why do I need to disable them everytime? Version is 2.90.1

[*P0P$*FR3$H3NM3Y3R*]

Do you mean it looses its edge mark when you merge double verticies, or does it prevent you from merging verticies when they are marked sharp?

[Captain Toof]

No, it merging vertices, but some edges becomes sharp. May be mesh specific, but not sure.

[*P0P$*FR3$H3NM3Y3R*]

So it marks some edges sharp when you execute merge by command?
This sounds like a conflict with a potential double hotkey assignment.
You can hit F3 to bring up the search menu type 'mark sharp' ...and check which hotkey is assigned to that on the right side of the entry.
I got my hotkeys set to blender classic so for me mark sharp is 'CTRL-E' (edit that actually brings up the edge menu and then i would have to hit k), while merge by is set to 'M'.. i haven't run into this issue so far so it might be worth looking into it.

I'm having issues replicating this, does this happen when you already have existing edges marked as sharp or can that happen on meshes without edge marks too?

[Captain Toof]

Hotkeys are full stock, you might check this one... (fbx)
https://drive.google.com/file/d/1ZhfGbOZ80nph42H4pJbnvcaTAtQralHM/view?usp=sharing

[*P0P$*FR3$H3NM3Y3R*]

Doesn't allow me to access these files, no permission.
Textures and Material should not influence mesh edge markings anyway.

[Captain Toof]

Try now

[Captain Toof]

And yes, this is vertex specific.