[2.0.20] Connecting fusion generators' output back into fusion reactors sometimes results in plasma loss

[AbyssMage]

As discussed in further comments in this thread, when a fusion power setup has generators whose output connects back into the input/output ports of a reactor, plasma can get lost and overall power production gets reduced. Deleting and rebuilding a generator can fix the issue, so the order of operations seems to make a difference.

Attached are an image and two blueprint strings (with infinity chests and pipes, since this was done in the map editor) which demonstrate the issue - one working setup with one reactor and two generators, which generates the expected 100 MW in all cases, and one broken setup where a generator is shifted slightly to connect one of its outputs back to the reactor. When the broken blueprint is first placed, only one generator receives plasma, as shown in the image provided. If either of the two generators is deleted and rebuilt (but not both at once), they both start receiving plasma. If both generators are deleted and rebuilt simultaneously, it seems to break again.

I've also attached a log file as the reporting instructions requested, though I don't expect anything in there will help diagnose the issue thanks in advance!