Characters lost on connection to board since M33

Two problems came up after updating to M33.

1. reading process.env after connect often stops during reading data
   I checked incoming data in getProcessInfo, and recognized that data in about 50% is not received to the end. Changing timeout did not change anything. After switching back to prevReader it looks like missed data comes in to prevReader.
   Problem is easy to recognize. If you see process.env in terminal window, this problem happend.
   
2. by sending data to espruino board, sometimes characters are lost.
   I checked this by copy/paste line by line to terminal window. Sometimes characters are lost, this happens in about 10% of lines.