Pressing back should go back instead of exiting app if opened via recents after an image is opened from an external app

[vertigo220]

Checklist

• [X] I made sure that there are no existing issues - open or closed - to which I could contribute my information.
• [X] I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
• [X] I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
• [X] I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
• [X] This issue contains only one feature request.
• [X] I have read and understood the contribution guidelines.
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Feature description

Currently, if opening an image in Gallery from another app, e.g. a file manager, then pressing back, it goes back to the other app, which makes sense. However, the problem is that if the user then decides they want to open Gallery and use it normally, if they do so from the recent apps, it opens to the previously opened image and pressing back just closes Gallery. In this case, when it was switched to vs being opened from another app, it should behave as if it was opened normally from the launcher. As it is, the only way to use it normally at this point is to open it that way, which is annoying and not as fast as simply being able to do so through recents.

Why do you want this feature?

To make it quicker/easier to open and use normally from recents after being opened from another app. The current behavior is frustrating and unexpected, as when opening the app not from another app and pressing back, you would expect it to navigate up a directory, not exit.

Additional information

No response

[Aga-C]

The correct behavior, how other apps do, is to not show itself in Recent Apps after going back from a file opened by another app. Current behavior isn't correct, especially that steps you've described can't be exactly reproduced on every OS - I had a case that launcher showed the app in Recent Apps, but didn't allow opening it back.