Two are our apps and two are apps from another Partner that noticed a similar issue.
I have also posted on the Shopify Partners #appdev Slack channel and more people have noticed the same thing.
We have made changes on one of the apps that could possibly cause a change in LCP, but none on the other apps that would justify a change in the trend like the one seen in the charts.
We also noticed a dramatic increase in our app’s LCP numbers starting at around the same time (June 13). We did not deploy any releases or make any changes in June before the 24th. We just got a warning today that our Built for Shopify status is now at risk.
It is possible that the problem is not even in LSP metric.
I noticed that creating a session can take a significant amount of time, especially if it is an app installation. The installation process (registering webhooks, etc.) and creating a session can take up to 1.5 seconds.
At the same time, the ping to admin.shopify.com on my server is around 1 ms
Thanks for sharing these examples - I’ll connect with the relevant teams on this. Are there any common traits across these apps, eg: all using the Remix template?
We are seeing this issue as well with inflating LCP around the same dates , but we are using App Bridge 4, Rails, Polaris React along with web components.