Test mode loading/reloading times are too slow

[ApoChiffa]

Can we access your project?

• I give permission for members of the FlutterFlow team to access and test my project for the sole purpose of investigating this issue.

Current Behavior

After the update, the Test mode takes much longer to load (blue loader is our constant friend).
Meanwhile, in the console, I can see the log showing that it loads scripts in small batches (which takes forever, and before the update these events never showed at the console), and after some rewrites, the preview finally loads. Please refer to the screenshot below.

Moreover, an instant reload, which previously took around 10-20 seconds, now loads my project in 4 minutes, which is definitely not "instant."

Expected Behavior

Proper and fast loading and reloading of the project in test mode.

Steps to Reproduce

1. Launch the test mode.
2. Go to have a nap.
3. Wake up and check whether the project is finally loaded. (Optional bonus: random build fails included from time to time with no errors in the project.)

Reproducible from Blank

• The steps to reproduce above start from a blank project.

Bug Report Code (Required)

IT4okcjf35dItbxF1s7idcFKgSQRHFAlRo0ZkspBZywgfZzzBLN/fPfQP1poYNO8TWxEfGC2p14zw9bzhuHTKcA6Ok2CR4RZwc1QVzrhfES5SqWTF7WoY3MkO99MCn2B0rejuh1vPsViZXwa12D7AOuAQnTsN4DEIVQ8Sq/LZO4=

Visual documentation

Environment

- FlutterFlow version: v.6.5.5 (Feb 10, 2026)
- Platform: Web
- Browser name and version: Google Chrome 144.0.7559.110
- Operating system and version affected: Windows 11 25H2 26200.7623

Additional Information

It is impossible to test an app, when I spend most of the debug session waiting for it to load.

[ApoChiffa]

Today I also started receiving a new error when loading test mode.

[Juansarmi]

Hello!

I’m sorry to hear that you’re experiencing this issue. What you’re seeing is expected behavior in FlutterFlow. Loading Test Mode can take some time, including when using Instant Reload.

Please also keep in mind that as your project grows, Instant Reload may take longer to complete. To ensure that Test Mode runs properly, make sure there are no errors in your project.

Best regards.