Pixel editor keeps reverting changes

I have officially reported this bug before, but it was rejected because it could not be reproduced. Understandable, since it is very hard to reproduce since it happens quite randomly.

I am raising this topic to see if anyone else has gotten work lost due to built-in pixel graphics editor losing progress. And perhaps find out what causes this, is it just me, construct or browser buggy.

Basically I just lost an hour of progress because I forgot to close the pixel editor and re-open it. If there was a save button only... the one that saves current edited image in a project while pixel editor is open, not into separate file.

* My C3 window with one project has been open 3 days now.

* I have several frames, I was working with one of them.

* After about an hour, the frame reverted back to its initial state, I lost all progress as I was drawing.

* This happens when I have used the selection tool and moved stuff around with it. It reverts to pre-selected position in random times later, losing all the changes in between (pencilings, fillings, etc).

* My browser is Microsoft Edge, but this was also happening in Chrome. Construct is open separately, not in my main browser window.

My guess is that some cache somewhere is getting full and it is reverting to some initial state. But sometimes it happens quite quickly. I would prefer if I lost undo states instead of progress...

Is there something I can do to prevent such loss of data?

Maybe this is also help, although I don't know what time the errors happened or if they are correlated to problem atl all:

I have had this happen, too, with pixel data reverting when closing the animation editor. It was a while ago but I remember copy/pasting with selection tool.

More commonly, like Tokinsom mentioned, origin points move around after clicking a different anim/closing animation editor. This was more recent and common, and I know what I was doing (but didn't investigate) - I was copying single animation frames from the frame bar, then pasting into another existing Sprite's animation (usually a new animation), then adjust the origin point, then click a different anim/close animation editor...boom, sometimes origin point moves...or not...

I do wish we could report bugs that haven't been repro'd but are known or severe - e.g. I had reoccurring project corruption bug from Return Functions (since been fixed) but couldn't repro for months, so posted anyway, but was doomed to be closed and lost... Thankfully I figured the very specific way to trigger it (as you would with a project corrupting bug... Which turned out to be trivial to hotfix your project... Had I known).

I have a bug I really don't like, discovering it as I clean up a long-term project - deleting objects and reorganising their folders, saving often, sometimes the save fails once with a specific error, and then I KNOW what comes next - click save again, it will work this time, but close project, reopen, and project will fail to open due to a missing image file (often from an object NOT deleted). Thankfully console gives logs of exact files and can pull the image from backups. Only clue I noticed, is the filename differences sometimes, like some images end with 0001 but others don't (maybe due to it being a project from over 4 years).

LASTLY and I wonder if anyone else had this - moving a family into a folder, suddenly the family's events do not run (yes, in the project bar, just to organise your families).

Edit: Protip that helped me identify the obscure Return Function project corruption issue - use recording software like Nvidia Shadowplay that let's you hit a keyboard key to save the last 5 or 10 mins of whatever you were doing... Helped me retrace steps (although still difficult as the "trigger" of the bug may have happened far earlier or from something excruciatingly subtle).

I have had this happen, too, with pixel data reverting when closing the animation editor. It was a while ago but I remember copy/pasting with selection tool.

Same here. It always happens randomly, which is frustrating. I've also had some issues with pasting selections in general, as sometimes copying a selection and pasting it will just paste a transparent selection.

Again, it happens at random, so It's not like I can open a bug report...

I'm on the latest stable and the selection bug still happens at least once every time I'm working in the animations editor selecting and moving stuff around.