I probably hit the limit, if I remember well there is more than 4000 lines in the files where I noticed it, so probably more than 10000 char.
Maybe the limit for jump matching must be increased since it's probably not hit the global performance of ST (I suppose it only search when the command is executed).
The outer bracket didn't work.
Didn't find it online, but I could send you some of them on Monday if you need it.
Thanks for your reply.