[Bug] webusb-serial issue with Chrome on Android

**Describe the bug**

On a Samsung S9+ phone, webusb-rgb works fine, webusb-serial will not write text in the receiver window when typed in the sender window.
All demos require connect which works, corresponding LED or NeoPixel light as expected on Connect
So connect code appears 100% ok
Just the echo for Android Chrome may be trouble.
I switched from Samsung keyboard to Google Keyboard, no change
Adafruit test with CPS board and code in GitHub

**Set up (please complete the following information)**
- `Your Board and BSP version:` Circuit Playground Express BSP 1.5.3
- `TinyUSB library version:` 0.6.0
- `Your OS (mac/windows/linux) and its version`: Samsung S9+ v
- `Serial debug log if any:` n/a

**To Reproduce**
Steps to reproduce the behavior: Normal testing

**Expected behavior**
Text should be echo to receiver on landing page