No, on the contrary, studies suggest that the Released Time Chapel On Wheels program could actually enhance rather than inhibit academic achievement.
For example, a study by Professor David R. Hodge, PhD, from Arizona State University - School of Social Work, published (https://www.researchgate.net/publication/276455255_Latino_Students_and_Spiritual_Release_Time_Programs_Does_Releasing_Students_From_Class_for_Spiritual_Instruction_Impede_Academic_Achievement)in peer-reviewed journal, Families In Society: The Journal of Contemporary Social Services states:
The impetus to prohibit release time is based on the belief that participation in release time hinders academic achievement. This study suggests that such beliefs are unfounded. Indeed, the results indicate that, if anything, release time enhances rather than inhibits academic achievement...Accordingly, school districts should consider supporting release time programs where they presently exist. Similarly, districts without release time programs should consider implementing such programs where community interest exists in starting such programs.
Source: Hodge, David R.. (2012). Latino Students and Spiritual Release Time Programs: Does Releasing Students From Class for Spiritual Instruction Impede Academic Achievement?. Families in Society: The Journal of Contemporary Social Services. 93. 141-150. 10.1606/1044-3894.4195.