Sorry for the delay, Nikse555,
Before I tried your update, I had to download the srt from MediaFire as I did not
keep a verbatim copy. I tried it with the original faulting build 25663, and it did
not fault. Tried this several times, no fault. Got the version srt that I kept,
(probably spell checked via other means) and checked that, same thing, no
fault. Have not ripped any other subs since then (I think) and made no changes
to the setup. I guess it will have to remain a mystery.
EDIT: Also tried with build 13726, no fault (earlier build No ???).