(At times) in Ramadan the Prophet ﷺ used to take a bath in the morning not because of a wet dream and would continue his fast. (Using translation from Bukhārī 1930)
كَانَ رَسُولُ اللهِ ﷺ «يُدْرِكُهُ الْفَجْرُ فِي رَمَضَانَ وَهُوَ جُنُبٌ مِنْ غَيْرِ حُلْمٍ فَيَغْتَسِلُ ثُمَّ يَصُومُ»