loading images via LEL may fail or may be unexpectedly successful

[kswang1029]

Describe the bug
The directory path in OPEN_FILE message does not update when directory changes. This results in

1. cannot load an image via LEL
2. can load an image via LEL, which does not exist in the current directory

Demo of 1)
Firstly, try to load an image which does not exist in the current directory. It will fail as expected. Then navigate to the directory which contains the image that we just tried to load. It should load but we see it failed.

Untitled1.mov

Demo of 2)
Firstly, try to load an image which does exist in a directory. It will load and it does. Then navigate to other directory which does not contain the same image we just loaded. It should fail but we see it loads successfully.

Screen.Recording.2022-07-09.at.11.18.17.mov

Platform info (please complete the following information):

• OS [e.g. macOS Monterey]: macOS Monterey
• Browser [e.g. chrome, safari, electron app]: chrome
• Browser version [e.g. 22]: 103
• Backend branch [e.g. dev, v3b2 release]: dev
• Frontend branch [e.g. dev, v3b2 release]: dev

[kswang1029]

@veggiesaurus This is an issue reported by a v3 beta tester (and sorry I did not pick it up at the time of implementation 🙈). Would you be able to squeeze some time to investigate this? Would be nice to fix this for v3-final if possible.

[kswang1029]

Actually, I see identical OPEN_FILE message context in the two cases. So this is probably a backend issue instead. Transferring to backend repo.

[kswang1029]

@markccchiang would you be able to investigate this?