As far as the fast of 15th Sha’bān is concerned, we discussed it. Moving on, does the night in general hold virtues. The answer is yes, the night does hold specific virtues but to my knowledge, no specific worship has been prescribed for the night. And Allah knows best.

And he (Al-Mundhiri ) said:

“Al-Tabarani narrated it and Ibn Hibban narrated it in his Sahih.” Imam Hafiz al-Suyuti mentioned it also in Al-Durr al-Manthur from al-Bayhaqi and Hafiz al-Haythami mentioned it in..

Majma’ ‘l-Zawai’d (vol. 8, p. 65) and he said: ‘Al-Tabarani narrated it in [Al-Mu’jam] al-Kabir and [Al-Mu’jam] al-Awsat, and its narrators are reliable.’”

Imam Hafiz al-Mundhiri also mentioned in Al-Targhib wa ’l-Tarhib that Imam Ahmad narrated from ‘Abdullah ibn ‘Amr (may Allah be pleased with him) that the Messenger of Allah ﷺ said:

“Allah, Glorified and Exalted is He, bestows His special attention to His entire creation on the 15th night of Sha‘ban. He then forgives His creation except two: one who harbours enmity and the murderer.”

Hafidh al-Haythami mentioned it in Majma’ ‘l-Zawa’id (vol. 8, p. 65) and said:

“Imam Ahmad narrated it and in it is Ibn Lahi‘ah, and he is layyin (lenient) in hadith. The remaining narrators are all reliable.”

Shaykh Al-Albani has mentioned it in Silsilat al-Ahadith al-Sahihah …. (vol. 3) After discussing the chain of transmission of the hadith and relating the statements of the scholars, he stated: “The hadith is hasan.”

“It is disliked (makruh) to gather in the mosques for prayer, narrating stories and supplication. It is, however, not disliked that a man prays salat in it by himself. This is the view of al-Awza’i who is the imam of the people of al-Sham, their faqih and their scholar.”

"Imam Ahmad (in one narration) has not considered preferable standing in prayer with congregation because this has not been conveyed from the Prophet ﷺ and his Companions"

“Likewise, regarding standing in prayer on the 15th night of Sha‘ban, nothing has been established from the Prophet ﷺ or from his Companions, but there is something established from a group of the Followers from the notable jurists of al-Sham.”

“It is clear that the bid‘ah according to the people of the Hijaz and the companions of Malik is not due to the diligent observance of worship in the 15th night of Sha‘ban itself, but rather the bid‘ah is the gathering in the mosque in this night and to keep it awake in..

a gathering, wearing one’s best clothes, to burn incense, to apply kuhl on the eyes and other various activities in it. They considered that this was not from the habits of the Companions and the major Followers رضي الله عنهم.”

This is a minor portion of the detail research conducted by the late Shaykh ul Hadith Moulana Abdul Hafeez Makki رحمة الله عليه

والله اعلم بالصواب