watchOS 6 breaks third party charging

hi all. i have an apple watch series 4 and just upgraded to watchOS 6. i have two genuine apple chargers and two aftermarket chargers. after watchOS 6, there is now a charging loop when using the aftermarket ones. it will charge for 10 seconds, then seems as if it loses the charging connection, then immediately charges again for another 10 seconds, repeat. the two aftermarket chargers i purchased are:

https://www.amazon.com/gp/product/B07TH9BVPC/ref=ppx_yo_dt_b_asin_title_o03_s00?ie=UTF8&psc=1

https://www.amazon.com/gp/product/B07VHP96BB/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1