I did quite a bit of work on my track today, and luckily, I was overly cautious about saving it, as usual. I started a new tab with the editor, and exported, and imported into the new tab, and some of the lines were missing. Here is a cruddy video I made. There are two possibilities of what went wrong. 1. For some reason, the game didn't recognize that I had drawn those lines, even though the graphics did. 2. Something went wrong with the redo and undo, because I used those a lot, and they may have messed it up. I know that it is not a problem with the exporter, because the chance of it leaving out an entire "curve tool" line, but nothing around it, is really low. Luckily, the lines that were missing were easy to re-draw, but I am afraid that if this is not fixed, that will not always be the case in the future.
Yeah, I'll give it a look today, hopefully I will find the bug. You may be onto something with the redo / undo. It can be the exporting. If an error occurs while within the export function , the function could exit, and not finish exporting process.
Temporary fix: Draw multiple grey lines over the black line. Then erase all grey lines with the black line. The line will not come back now.
This should all be fixed. The main issue with the exporting issue (not the erase) was due to the redo undo. The redo wasn't working properly. Safe drawing
What does "saved" mean? You pressed export and it didn't do anything? You uploaded and the resulting track was blank? If so, provide link? You closed the browser and lost your progress?
The same thing happens with autos. The first time I was making Exogenesis one of the lines was removed because I was using undo and redo. But now I'm using the eraser, so there shouldn't be any problems for me when I make autos.