Baha'u'llah and Abdul Baha advocated Taqiya but Shoghi Effendi made a law prohibiting it.

ʿAbd-al-Bahāʾ himself urged his followers on different occasions to practice ḥekmat and abide by taqiya: ʿalaykom be’t-taqiyya (ʿAbd-al-Bahāʾ, pp. 325-27).

But Shoghi Effendi made a law prohibiting dissimulation:

The first notion of a prohibition in regard to dissimulation seems to be contained in a letter of Shoghi Effendi to the National Spiritual Assembly of the Bahais in Iran, dated 9 November 1927.

https://www.iranicaonline.org/articles/taqiya-ii-among-babis-and-bahais