Overwritten images: new image does not show, but the (replaced) old one.

[josedumoretzsohn]

Since I installed XN MP 1.3.1, some 2 or 3 months ago, I stopped using the Classic version alternatively for the few resources I thought it performed better than MP.
And I don't miss it at all. However, I have been experiencing some bugs, I would say "internal confusions" perhaps between catalogue and clipboard, in the overwriting of previously saved images. Not seldom the previously written images (the old images) keep showing until:
1) I close all opened strips; and/or
2) I click on a different folder, then click back on the previous one; and/or
3) I empty all the Catalogue (Katalog), sometimes even twice before the issue is solved; and/or
4) Often I use the Refresh Catalogue and/or Refresh Files from Catalogue in the View menu. To no use.
4) I close and restart MP. Only then, if there are no strips reopened, the newly saved image (the overwriter) shows.
Recently I began using the command Save All, in the File menu only in the Viewer mode, after performing overwriting operations, and "I guess", though not surely enough, the issue has been solved.
Is this a real bug, or am I mishandling the operation, or some intermediate one?
Just a deposition. Thank you for your attention.

[xnview]

sorry but could you post some screenshots?