In Belz they did not say shir hashirim. I never saw my elders, who had a strong connection to Belz, say shir hashirim. (I never knew why ) I guess it was part of the Belz in them. I was surprised to see that - or NOT to see that - because in Oiberland, where my family is from, and by other chasidim it was very holy to say it. After the mikvah, with the peyos still wet. Mamash a gevalt! In the footnote here they note a certain Sefas Emes (which by the way was not on the recommended learning list in old Belz, they would rather get caught learn Arugas haBosem) in Pesach that on regular weeks the parables of shir hashirim are a bad influence for people who are megushem. It's probably the reason why Belz avoided it too. But they never said that outright. But in Ger they were more explicit.
