How to remove passwords from memory in Android WebView. (memory dump)

Question

I tested the same webpage in chrome and my app.
entered the id/password and got a memory dump (frida3)
Only the ID was found in Chrome.
But in my app, both ID/password were found.
I think my app is the problem because I tested it on the same page, but I don't know how to fix it.

1. Test data
   - ID: ABCDE
   - PWD : QWE123

2. Memory Dump
   - Chrome browser
      ABC
      ABCD
      ABCDE
   - My App
      ABC
      ABCD
      ABCDE
      QWE1
      QWE12
      QWE123