Plugins take off

Hi Denis Chemeris, thank you for your report.
Could you please provide us additional information for further investigation:
1. Collect Rider logs via Help | Collect Logs and Diagnostic Data;
2. Create an archive of whole settingsSync folder from the Rider configuration directory;
3. Capture a screenshot of the Settings | Backup and Sync;
4. Upload all of this to our server https://uploads.jetbrains.com/ and provide us with the Upload ID. The uploaded data will be accessible only to our team and will be used solely for investigating this issue. 
Thanks!

Upload ID: 2026_02_19_HJ4afEQ83iH5XaEqM9Y3g4

I disabled sync, but you could see my previous settings for sync (disabled sync didn't help)

Thank you for your reply.
In the files you provided (apart from the IDE logs), there is only part of your Rider configuration directory, but the required settingsSync folder is missing.

To investigate the issue, we will need a full copy of the settingsSync folder located in the Rider configuration directory (e.g., ~/.config/JetBrains/Rider2025.3/settingsSync). It would also be helpful if you could provide the settingsSync folder from the WebStorm configuration directory (~/.config/JetBrains/WebStorm2025.3/settingsSync).

If the settingsSync directory is not present in the Rider and WebStorm configuration directories, please enable synchronization (Settings | Backup and Sync), reproduce the issue, and then send us an archive containing the settingsSync folders.
Thank you!

I just disabled settings sync for both IDEs, and this is enough for me. Right now I don't have troubles.

Thank you for your response.
Most likely, the behavior you described earlier occurs for the following reason: in Rider and/or WebStorm, you have a plugin installed that is compatible with one IDE but not with the other. If you have different plugins installed in Rider and WebStorm, this is recognized as a settings difference. For example, you first launch Rider, and one list of plugins is synchronized; then you launch WebStorm, and the synchronization service detects that the plugin list in WebStorm differs from what is stored in your account, and it attempts to apply the settings according to the data in your account (if a plugin is not compatible with the IDE, it will not be activated).

In your case, instead of completely disabling Settings Sync (Settings | Backup and Sync), you may try the following solutions:
1. Use the option “Sync Settings across: JetBrains Rider instances only” to keep settings stored separately for WebStorm, Rider, and other JetBrains IDEs.
2. If you prefer to use “Sync Settings across: JetBrains IDE products and Android Studio”, then disable plugin synchronization in the list of synchronized settings.