Same as wept

Yeah OP’s words are definitely not accepted but British English still has lots, another I just thought of is Dreamt

Susie Dent mentioned on a radio 4 show that words that maintained the archaic -t ending are usually more commonly used words. Words that are used less lost their -t ending and gained a more generic -ed ending as people were not taught it and used the rule they knew. So words we have like slept, dreamt, smelt are regularly used words day to day.

When we had our broadband installed the guy doing it took way too long and got very frustrated and made a mess of it, but it worked. Two days later it stopped working.

When the fault engineer came and fixed it, turned out the original engineer had connected us to the wrong cable, so when another engineer came to set up our neighbour’s Internet, they disconnected ours.

Someone might recognise your issue though and have suggestions, even if you can’t reproduce it exactly

This seems very odd, I’ve been using syncthing for a good 5 years and never had a single file corrupt - might be worth opening an issue on their github