When debug async function in Angular project this is undefined

Hello. I’m running into an impediment.
When debugging my project with the Chrome Developer Tools, in asynchronous functions, the “this” context is undefined.
In non-asynchronous functions, the “this” context persists its value/context.
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I created a test project with ionic start to validate and it happens the same as in my personal project.
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I am attaching evidence and I hope you can help me.
Thank you