The phrase "are caused when the" is correct and usable in written English.
It can be used to describe a situation or event that occurs as a result of a specific trigger or condition.
Example: "The symptoms are caused when the body is exposed to allergens."
Alternatives: "result from when the" or "happen due to when the".
FILLED DOUGHNUTS -- Problems are caused when the cream or jelly fillings ooze out, distracting the driver.
As shown, previously, these fluctuations are caused when the relative fluid flow interacts with random fluctuations of particle concentration.
But this kind of brain test is well suited to identifying the often subtle injury of concussion, which are caused when the brain slams against the skull.
The tropical rainstorms that usually drench Indonesia, the Philippines and northern Australia are caused when the warmth of the seawater abutting those islands causes the air above it to rise, and consequently to cool.
Supernova remnants are caused when the debris thrown outwards by the explosion crashes into surrounding material, generating a shell of hot gas and high-energy particles that glows brightly in X-rays, radio waves and other wavelengths for thousands of years.
Other types of immune disorders, such as allergies and autoimmune disorders, are caused when the body develops an inappropriate response to a substance either to a normally harmless foreign substance found in the environment, in the case of allergies, or to a component of the body, in the case of autoimmune diseases.
In this case, disease is caused when the prediction is wrong.
Multiple sclerosis is caused when the immune system, for unknown reasons, attacks the nerve fibers.
It is caused when the moon passes through the shadow of the Earth.
The disaster is believed to have been caused when the pilot became disorientated by the failure of flight instruments.
