Auto-save disappears

Environment:

• Browser: Chrome Version: 141.0.7390.123 (Official Build) (x86_64)

• MacOS Sequoia Version 15.7.1

• projectId=68f6317c4621c16452b6ec8e
  

  🔍 S teps to reproduce:

1. Open Forex Tester Web App.

2. Select EUR/USD instrument.

3. Open the minute chart (M1).

4. Start practicing and switch to block drawing mode.

5. Draw blocks for three consecutive days (approximately 3×24 hours of data).

6. Continue drawing blocks for the fourth or fifth day.

⚙️ Actual result:

• After three days of rendering, autosave stops working.

• When trying to continue rendering, the app gives Google chrome error #5, after which the page hangs or reloads.

✅ Expected result:

• Autosave should continue to work without errors when rendering for any number of days.

• The application should not go to error #5 when continuing to run.