That shouldn't happen.
Photos get saved immediately, maybe something not set up correctly with the path photos are saved at?

/public/uploads/

eeeee you are right, photos are saved there. But if there is some crash and the instance is recreated the assets are deleted.

Maybe there is a way to share images via some cloud services such as S3? Or maybe I can save them on database? Basically, any other way except of local one

You can use https://github.com/NodeBB-Community/nodebb-plugin-s3-uploads

baris does it work with the 4.3 version? or with any 4+?

Yes its compatible with 3.2.x and 4.x

You can use the S3 plugin. However, the underlying problem is that you are using some sort of service with an ephemeral virtual drive. It gets cleared every time the service restarts.

If you don't want to use s3, you will have to set up a volume and mount it to the /public/uploads folder.

baris julian Thanks for all the help, will try something from it and come back to you with the results

baris julian I've tried this plugin and everything worked except one thing. Favicon and related things aren't saved in S3, maybe I've done somehting wrong?

Current version is 4.4.3