So I have resource pack that make crossbow different texture. It works fine with OptiFine but it doesn't work with CITResewn. Is it an issue?

I had a similar issue. Fixed it by removing the line with crossbow_standby model in the properties file. Maybe it's the same issue, but it's just a guess, since you didn't leave a link to the resource pack.

KPidS is right, can't help without both the pack and your logs.