Hi all,
I know this is a very old thread, but I'm afraid this issue is still not solved. I'm running into a very similar problem while using Arduino IDE version 1.8.8. Trying version 1.9.0-beta indeed solves this problem, but has multiple other problems (can't program or write data to ESP SPIFFS while serial monitor is running & sometimes all menu items are shown twice). I hope this problem will be solved in a normal release soon.
Thank you,
woutput