Forster lost several of his positions due to the zeal with which he pursued Lutheran theology, namely those of Augsburg and Tübingen, but he remained amicably with other employers like the counts of Henneberg-Schleusingen despite such differences.
Forster gave up several positions because of his intense focus on Lutheran theology, particularly at Augsburg and Tübingen. Nevertheless, he maintained a cordial relationship with other employers such as the counts of Henneberg-Schleusingen, even though there were differences in their views.