Due to technical reasons, a PID always needs to be last in an dialogue file. It could be that one of your other mods added a dialogue for Sarevok but didn't give it high enough weight, and Sarevok Romance was installed before this mod, leading to the so called stutter bug where the NPC tries to start a dialogue but the engine can't call it because it's "below" the PID, leading to a stutter with the PID popping up every time.
One way to prevent this is to install NPC mods always after other mods that might add dialogues for them. NPC mods should always go after quest mods, anyway. (Also, if you install e.g. the Flirt Pack from PPG, install it late after all NPC mods to prevent this bug from happening).
Thank you, Jastey I know about the load order and I installed Sarevok Romance after the quest mods for SoA part and got this stutter bug in the first place XD I reinstalled everything yesterday - Ascension, Wheels of Prophecy, Sarevok Romance (in that order) and other mods in right order after these mods - and romance mod started to work properly. Idk if it matters but I've tested ToB with new created character. If bug will happen again with my main character... Well, it will be bad