I initially wanted to make a bug report about this but decided against it, since the issue is most likely due to the code. Unfortunately with my limited knowledge and the project's lack of updates, i cannot find any sort of fix to the issue presented in the title. I am running CC 1.101.2, with a old Draconic Evolution program that sends information for the draconic reactor. I managed to fix it up to work with 1.18.2's DE version thanks to the help of some people on DE's discord, but one thing i can't find any concrete documentation on is the constant screen flicker.
Here's my updated fork of the program itself: https://github.com/coaber/DEReactor
I've managed to find some 'potential' methods to fix it such as using a buffer or a redraw function, but to be quite honest, i have no clue how to go about doing that, so my last place was to ask here.