iOS: Really slow inspection with devtools open

[joshuaiz]

Just opened Inspect to check a mobile site I develop. Getting a completely blank screen with no HTML or anything. Ran setup again and Inspect is seeing my device and the page in iOS Safari.

Tried re-downloading Inspect and still nothing.

Not sure what to do now.

[joshuaiz]

Deets:

iOS 26.2
Inspect 1.0.9

[dosubot]

Hi @joshuaiz! I'm Dosu and I’m helping the inspect-issues team.

Blank inspector panes have been reported before, sometimes resolving after restarting Inspect or the device, but with no clear root cause identified. In some cases, Safari extensions (like Kagi) on iOS caused Inspect to show no HTML—disabling and re-enabling the extension fixed it for those users. There’s also a recent report with Inspect 1.0.9 where styles didn’t render on iOS, which resolved itself after a day and a few device resets, suggesting a temporary or environmental glitch rather than a persistent bug.

Try restarting both Inspect and your device, and check if any Safari extensions are enabled—if so, try disabling and re-enabling them. If the issue persists, let me know if it happens on all sites or just specific ones, and if you have any extensions or unusual configurations active.

References:

• Safari extension causing blank inspector
• Styles not rendering, resolved after resets
• Intermittent blank DOM, resolved by restart

To reply, just mention @dosu.

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[joshuaiz]

Great thanks and yes I do use Kagi. Let me give those suggestions a try.

[joshuaiz]

@auchenberg Tried the bot suggestions; tried complete iPhone restart then turning off ALL iOS Safari extensions and still nothing.

Anything else I can try here?

[auchenberg]

@joshuaiz I would love for you to try this build of Inspect which is our coming release: https://download.inspect.dev/builds/251216u3zvvs2of/mac/

In addition if you go View -> Toggle DevTools. What do you see in the console?

[joshuaiz]

Hi @auchenberg the new build ultimately did work — I can see the HTML now but it took almost 1m for the inspector tabs to load.

Similarly when opening the Inspect DevTools (we're getting meta here) it took almost 1m to load. And seeing tons of these errors in the Console:

11:14:22.838 (renderer) › execCommand inspect:sendMessageToTarget
index-Dm6Mqd11.js:8219 11:14:22.839 (renderer) › execCommand inspect:sendMessageToTarget
index-Dm6Mqd11.js:8219 11:14:22.842 (renderer) › execCommand inspect:sendMessageToTarget
index-Dm6Mqd11.js:8219 11:14:23.085 (renderer) ›  -> sessionTracking.sessionTimeUpdated 767000
index-Dm6Mqd11.js:8219 11:14:24.055 (renderer) ›  -> sessionTracking.sessionTimeUpdated 766000
index-Dm6Mqd11.js:8219 11:14:25.061 (renderer) ›  -> sessionTracking.sessionTimeUpdated 765000
index-Dm6Mqd11.js:8219 11:14:26.066 (renderer) ›  -> sessionTracking.sessionTimeUpdated 764000
index-Dm6Mqd11.js:8219 11:14:27.351 (renderer) ›  -> sessionTracking.sessionTimeUpdated 763000
index-Dm6Mqd11.js:8219 11:14:28.341 (renderer) ›  -> sessionTracking.sessionTimeUpdated 762000
index-Dm6Mqd11.js:8219 11:14:28.655 (renderer) › execCommand inspect:sendMessageToTarget
index-Dm6Mqd11.js:8219 11:14:28.723 (renderer) › execCommand inspect:sendMessageToTarget
index-Dm6Mqd11.js:8219 11:14:29.347 (renderer) ›  -> sessionTracking.sessionTimeUpdated 761000
index-Dm6Mqd11.js:8219 11:14:30.352 (renderer) ›  -> sessionTracking.sessionTimeUpdated 760000
index-Dm6Mqd11.js:8219 11:14:31.357 (renderer) ›  -> 

[auchenberg]

@joshuaiz Okay, thank you! Great to know that it loaded, but weird about the performance. Those are logs, not errors, so they should be alright in the console.

Generally, is Inspect slow for you overall, or is it when connecting to a device that its being slow?

[joshuaiz]

Slow in general. I really only use it with my iPhone (17 Pro/iOS 26.2) and viewing a fast site (even on mobile).

The site comes up in the sidebar and clicking on shows the overlay on the device but the inspector tabs were blank for almost a minute (e.g. Elements, Console, Network, etc)