OK, root cause found:
The default app for viewing videos was Google photos.
Apparently, after opening a video from the gallery and hitting back button, the Google Photos couldn't go back to the Gallery.
Once I changed the default video viewer to native Video app, I can easily go back to the...
Hi, glad to be part of the community! :)
Yes, just shows the last image.
I have back arrow, Delete, share, and many other options in the 3 dots.
But clicking back on the screen, or the home touch back button, exits the Gallery app completely