Is adb remount broken on android api 29?

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I started the emulator with
emulator -avd Pixel_3a_XL_API_29 -writable-system -no-snapshot-load

I found many ppl encounter emulator freeze and unable to start the android if you try

$ adb root
$ adb disable-verity
$ adb reboot   <--- By now emulator is freezed

Then you can try this

$ adb root
$ adb shell avbctl disable-verification  <--- this will not freeze the emulator
$ adb reboot

When the emulator restarted
Try to remount will be no issue

adb root
adb remount

adb push will be able to write on system directory

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