One of the ranges went blank when building a sim.

[SarahSilverMuck]

Hi. I don't think this is a major Issue but I thought I would let you know. I don't think I was doing anything unusual.

https://i.imgur.com/FVBv6B1.mp4

[b-inary]

Thank you for your report! I was aware that this problem might occur, but I need to address it now that it is actually happening.

This problem is probably caused by non-alignment in communication between the web frontend and the Rust backend. Since the range text encoding/decoding logic is implemented in Rust, both parties need to communicate with each other. It is fine as long as this communication is completed immediately, but if another operation interrupts this process, I think this problem will occur.

[SarahSilverMuck]

Glad I can assist a bit.