Karabiner-Elements: SpaceFN: Unwanted triggering at beginning of word.

My configuration is derived from SpaceFN, and I’m struggling with unwanted triggering. I type normal text, and it seems that I type the combination <space> <letter> with overlap sometimes, so that the corresponding SpaceFN binding triggers.

I thought about it and I think it would help if there was a timeout of some sort. Consider these sequences of events:

• space down; letter down; letter up; space up
• space down; letter down; space up; letter up

I’ve two ideas for timeouts that might help. One would be to require a minimum number of milliseonds between space down and letter down – if the time is shorter, then SpaceFN should not trigger. The other idea might be to require a minimum number of milliseconds between space down and space up.

I see that Karabiner has a number of parameters with such timeouts, but none seems to fit the bill. I have already decreased basic.to_if_alone_milliseconds to 100 (from 1000), but since the problem happens when I type fast, space is not held down for a long time.

Any ideas? Maybe there is another parameter that is applicable, I just don’t know.