I have TreatLife Dimmer DS01 (https://www.amazon.com/gp/product/B07CKNWGN4), which I was able to successfully flush with Release Tasmota v8.1.0 Doris for Hubitat · markus-li/Tasmota-Hubitat · GitHub following the procedure outlined by @MarcusD in [Release] Tasmota 7.x/8.x firmware for Hubitat + Tuya, Sonoff and other drivers. Was able to add the device using the "Tasmota - TuyaMCU Wifi Dimmer" driver.
To get dimming to work properly I had to execute following commands via console (based on TuyaMCU Configurations · arendst/Tasmota Wiki · GitHub)
TuyaMCU 21,3 (wait for reboot)
Backlog Dimmer 10; Dimmer 100
weblog 4 (increase logging to get dpId top range)
At that point everything works well and as expected.
Next, I wanted to secure the device so I configured the "Web Admin Password" and set the same in the device configuration (Device Password field). Since than I observed the the hub is not able to control the device (click on buttons in the device configuration page do not do anything to the device). At the same time the "current status" is accurately reflecting the state of switch/level and updates as I change by clicking the device button or via Tasmota Web interface on the device.
I also noticed that since password was set the device web interface and responses are noticeable slower and seems like web/wifi may be restarting from time to time (few times the device stopped responding to ping and web, need to observe longer to confirm).
Thank you for help.