Combustion problem as of a few months ago

[Dacien]

I've had an issue that has dogged me for months, and I've just kind of dealt with it, and I'm hoping for insight from the community.
Time was, I could combustion JUST before my cast went off (fireball, Pyroblast, whatever), but starting a few months ago, it would sometimes not crit.

I have since started my combustion a few hundred milliseconds BEFORE the cast finishes 400-600, and it works, MOST OF THE TIME.
Ever so frequently, it fails to crit even then. My latency is 60 home 60 world consistently.

Has anyone dealt with this issue also? WTH is going on, and how do I fix it?

[gatomon_ca]

R u making sure u alresdy have a heating up proc?

U need to combustion before cast ends BUT HAVE heating up proc up already.

So heating up procs ---> hard cast pyro or fireball --> combustion

[Fahrana]

I have exactly the same problem, But it become alot less so after i adjusted the spell casting delay(Google it and you will find a script to run).

I think it might be due to the fact that combustion used to snapshot exactly the moment it was popped, but now it only works for the next spell being channeled.