Mask randomly clears on lower ID#'d Preview Bridge node when multiple are used

[without-ordinary]

Upon testing, this is more of a bug than a missing feature.

Still trying to narrow down how to repo as its inconsistent on a clean install of ComfyUI with only Impact and Manager installed

Setup: Clean install of ComfyUI v0.3.5-10-g82c5308 ComfyUI_frontend v1.4.13 with Impact installed from Manager

Minimal workflow Preview Bridge Works Sometimes.json

It works as expected most of the time, but have encoutered two fault cases:

In some of runs from clean (non-executed graph, run to block, then creating masks on both, run again) it would get stuck in a state where nothing after them would try to run. As-if block was triggering despite both nodes appearing to have masks.

Got further repos similar to my initial report in #727 (comment) by editing the mask on the second node after an execution where it had previously worked. The mask on the first node would be cleared upon execution.

Neither of these repos are consistent and I have not yet narrowed down the exact circumstances that triggers the symptom.

[ltdrdata]

try.webm

I couldn't reproduce the issue on my end.
What are the exact reproduction steps for the issue you're referring to?