Funny behavior with the multiply note value clamp

[pikurasa]

Funny behavior with the multiply note value clamp

I think that the reproducible steps are:

1. insert notes into multiply note value clamp
2. Extract a middle note
3. Repeat 1 and 2, if the issue does not happen the first time

The issue is rather bothersome once encountered as there is no easy remedy to get the clamp working properly again.

Test Files (note that I am on 4e8f2c3 for this testing)
Funny-Clamp-State-2.html.zip
funny-clamp-state.html.zip

I also checked master... same issue: Clamp-issue-on-Master.html.zip

I do not see anything consistent in logs, but at one point in testing, I ran across

block.js:180 Uncaught (in promise) Error: COULD NOT CREATE CACHE
    at checkBounds (block.js:180)
    at checkBounds (block.js:187)
    at checkBounds (block.js:187)
    at checkBounds (block.js:187)
    at checkBounds (block.js:187)
    at block.js:203
    at new Promise (<anonymous>)
    at Block._createCache (block.js:171)
    at __processHighlightBitmap (block.js:906)
    at Image.img.onload (block.js:7753)

[walterbender]

Does the same thing happen to any other clamps? e.g. tie?

[sksum]

This seems to happens when using collapsed notes/blocks ( in any type of clamp )