PLEX not showing Rambo 1 first blood (1982)

[exceles]

NAS Model name: DS1019+
DSM 6.2.4-25556 Update 2
Plex Media Server Installed version 1.23.6.4881-6000
Inside plex I have Version 4.72.1 under URL: http://192.168.0.200:32400/
Inside plex I have Version 4.59.2 under URL: https://app.plex.tv/

Hello from Spain.

I am not able to make PLEX to show Rambo 1 (1982) and I have tried all I could think of.

This is the first time I got completely stuck after adding more than 5000 movies along the years: I have been stuck in the past with similar problems but I was able to fix them with some tricks that do not seem to work in this case. none of the tricks are working with this movie Rambo 1 First blood (1982). It is like if PLEX doesn’t like first movie of Rambo:

I have tried removing them from library, re-scan, back to library.
I have tried also fix matching other movies to Rambo 1.

The result is always the same; once a movie (any movie) is fixed match to Rambo 1 (1982), it is so completely gone from view that the only way to make it visible is to remove it from folder library and putting it back…

I have made a video where I show all this:
https://www.youtube.com/watch?v=I6vNAOYcUn4

I have been reading similar issues in other posts and try everything they say aldeady in there:

https://forums.plex.tv/t/plex-server-randomly-doesnt-find-media/722659/2
https://www.reddit.com/r/PleX/comments/pdy2ab/plex_will_not_see_rambo_iii_no_matter_what_i_do/

Thanks for any help.

[SE56]

Your naming of show is incorrect.

Rambo First Blood (1982)
/Rambo First Blood (1982).ext

ext = File type

Or:
First Blood (1982)
/First Blood (1982).ext

Result:

You will have to Sort Title as below.

When Readding the Title after changing name, you will have to do the Plex Dance.