Andrew Evdokimov

Issue appears to be specific to my Windows 7 x64 that uses the following drivers: hhdspmc64.sys and usbser.sys. Does not reproduce with another Win 10 laptop, Linux on Raspberry or...

> Which IDE do you use? Which serial monitor? I'm using Arduino IDE 1.8.13 with internal serial monitor and Putty 0.69, behavior is the same in both cases.

I've just reproduced the issue on another Windows 7 machine. Tried different drivers (included into distribution and installed by Zadig) but no luck - still encounter data loss on Serial...