I've got the Astronomik 6nm narrowband set and used to have the ASI1600MM-C. I never saw halos like that and have been very happy with my set.
All the below images were taken with the ASI1600MM-C, Astronomik SII and OIII where applicable.
These two used a Baader Ha:
https://www.astrobin.com/272385
https://www.astrobin.com/260551
These two had the Astronomik Ha:
https://www.astrobin.com/291734
https://www.astrobin.com/283343
Pretty sure I saw a thread on cloudynights that reviewed the new ZWO filters and if I recall correctly they were better, but OIII still had halo issues. I could be wrong on this though, I had no interest in buying the filters and simply saw it in passing. I encourage you to search the "CCD/CMOS Astro Camera Imaging & Processing" section to try and find that thread.