[Bug]: black semi-transparent tiles around the heat map

[jdbit]

Before submitting

• I have searched existing issues to make sure this bug hasn't already been reported
• I have cleared cache/cookies/storage or tried in a private/incognito window (if applicable)

Operating System

Ubuntu 25.10

Browser

Firefox 148.0

Expected Behavior

only heat map should be visible

Actual Behavior

For some reason there is transparent black background around the heat map. Also, when zooming some tales disappears.

Steps to Reproduce

Run in localhost. Opened in Firefox, generated heat map, zoomed in, zoomed out.

Relevant console output

Screenshots

Additional Context

No response