After using Serial Monitor OS High Sierra Freezes

After about 1.8.8 using the serial monitor for long term printouts from the Monitor the mac freezes and I have to kill the IDE. Seems to be OK on 1.8.8.

Usage creeps and instead of 2 and 3 percent I get 45 and 60%

It sounds the same as this bug report:

ldalep:
After about 1.8.8

ldalep:
Seems to be OK on 1.8.8.

This isn't clear to me. With which IDE version do you encounter the issue, and which IDE version do you not encounter the issue?