TypeError: Cannot read properties of null (reading 'length')

I am seeing some errors in the console like these:

````
content-script.js:1 Uncaught (in promise) TypeError: Cannot read properties of null (reading 'length')
at content-script.js:1:13498
at Array.filter ()
at content-script.js:1:13450
at u (content-script.js:1:68092)
at Generator._invoke (content-script.js:1:69422)
at Generator.next (content-script.js:1:68521)
at n (content-script.js:1:7686)
at s (content-script.js:1:7889)
at content-script.js:1:7948
at new Promise ()
````

Screenshot:

Start by reproducing the console error and tracing content-script.js at the reported filter location; the issue names no source file or test. Done means the reported error no longer occurs for the affected case, with a regression check if the project has coverage for it.

索引モデルが issue の本文から書いたものです。