Anyone have elevated liver enzymes several months after completing tr

I was diagnosed with triple negative breast cancer in February 2023. Completed chemo and surgery in September 2023. Continued with stand alone Keytruda every 3 weeks for 6 months finishing in March 2024. Six months after treatment with Keytruda was completed and during which time all blood work was within normal limits my liver enzymes (AST and ALT) shot up to 10-15 times normal. CT scan was clean and doctor thinks it could be delayed response to immune check point inhibitors (Keytruda). Has anyone else had a similar experience?