I have a lot of blocks in one sprite (about 4000) and also a lot of blocks in another sprite.
There is bug that local variables of one sprite is appearing at the second one.
That happens only when there a lot of blocks.


My browser / operating system: Windows NT 10.0, Chrome 81.0.4044.138, No Flash version detected

Can you share the project and link it here?

https://scratch.mit.edu/projects/392996206

First look at sprite “Draw3D” - local variables in that sprite is indicated with ~ (example ~xyC) you can see that variable(and like 50 another variables) are appearing in “Update” sprite
Also you can test it by going to “Draw3D” then showing some local variable then going back to “Update” you can see that variable becomes from “Draw3D”

Thanks for providing me the strangest mystery!

Also question: did you import a sprite file to the project, or used code from backpack?

None of above.
And I I haven't figured out when it's happening yet, but I know it's related to lagging between going between sprites(selecting) because there are a lot of blocks.

Here is minimized project that only thing in this project is the bug.
Scratch bug - Local variable in wrong sprite

Bug report:
:
What are prerequisites
When there are a lot of blocks in one(or in both , not sure) have a lot of blocks (4000+ in this case).

When bug happens:
By spamming clicks on green flag stop sign, sprite A, sprite B alternately.

How to fix it
Only way is to manually delete the variables in the wrong sprite. But it takes a lot of time if there a lot of local variables (all of them appears in wrong sprite).

Thanks, that's interesting! I'll investigate later and see if I can repro.

This happened to me a lot, but only when I made project copies. Odd.

yep