"currently when" is correct and usable in written English.
It is used to introduce a current or temporal condition. Example: Currently when people travel, they need to follow safety and health protocols to protect themselves.
Currently when a drone is captured it is difficult to trace back to an owner.
Currently, when purchasing an annuity savers are buying a guaranteed income for life.
"Currently, when genetically valuable individuals die, we collect and freeze ovarian tissue and sperm.
Currently, when a plane is on a collision course with a mountain, the computer warns the pilot to pull up.
Currently, when a fiber optic cable carrying dozens of different wavelengths of light reaches an electronic switch, each wavelength must take a different path through the switch.
Currently, when no owner has a majority stake, the S.B.A. determines who controls the company on a case-by-case basis.
Currently, when an airport expands, additional takeoff and landing slots are allocated by an independent coordinator, which sets aside 50 percent of them for new entrants.
Also, because CDs are the most popular format currently, when you reduce an image down the band members look really small".
Currently, when savers pay into a scheme, their contributions are boosted by tax relief at the rate they pay on their earnings – which can be as much as 45%.
Currently, when consumers are told they will be reimbursed for only part of a doctor's bill, they have no way of judging whether the insurer is stingy or their doctor is overpriced.
Currently, when a player passes the puck across his own blue line and the center red line, play is whistled down and there's a face-off inside the zone.
