That's a known fault of the A1990 model. Battery and keyboard have been replaced by Apple a few years ago.
Apple MacBook Pro A1990 2018 15" Core i7-8750H 2.2GHz 512GB 16GB Pro 555X 1Y W
Apple MacBook Pro A1990 2018 15" Core i7-8750H 2.2GHz 256GB / 16GB - 02
Apple MacBook Pro A1990 15.4" i9 9th Gen 16GB RAM 512GB SSD GBR Battery Service
GENUINE Apple MacBook Pro A1990 USB Type-C DC Jack Charging Port flex Cable
Apple MacBook Pro A1990 15-inch 2.2GHz 6-core i7 16GB RAM 512GB SSD - BH Normal
Apple MacBook Pro A1990 15.4" i9 9th Gen 32GB RAM 512GB SSD Battery Health Good