(BUG) display of installed custom nodes

I am using the version that requires a fully manual installation and a custom Miniconda environment.
All requirements are the same version, and there are no library conflicts.

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### 1. When the manager is launched for the first time, it does not display all the possible installed nodes. It only starts displaying them all after a restart. This is shown in detail in the video below.

https://github.com/user-attachments/assets/fd0aba47-5591-4b8b-8785-f8a008c6075b

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### 2. As far as I understand, is the issue with custom plugins not displaying correctly a common occurrence with the new manager?

### 3. Is it possible to fix this via the manager’s configuration file?

No source files, tests, or entry points are named. Reproduce the first-launch behavior with the manual installation and custom Miniconda environment, then trace installed custom-node discovery and its display path; done when all installed nodes appear without a restart and the configuration-file question is answered.

Written by the indexing model from the issue text.