What is the ruling on swallowing foul-tasting food in the mouth along with saliva, intentionally or unintentionally, during Ramadan or at other times, according to the Maliki school and others?

Swallowing saliva mixed with toothpaste by a fasting person invalidates the fast if done intentionally, but not if done byforgetfulness or involuntarily. Similarly, brushing teeth with toothpaste does not invalidate the fast, but one must be careful not to let any of it reach the stomach. However, if the taste in the saliva is not from the toothpaste, then swallowing it does not invalidate the fast. It was mentioned that the questioner suffers from waswasah (obsessive whispering), so it is preferable to limit the answer to what has been mentioned.